Period vs. Frequency

Periodnoun

A length of time.

Periodnoun

A period of time in history seen as a single coherent entity; an epoch, era.

Periodnoun

The punctuation mark “.” (indicating the ending of a sentence or marking an abbreviation).

Periodnoun

The length of time during which the same characteristics of a periodic phenomenon recur, such as the repetition of a wave or the rotation of a planet.

Periodnoun

Female menstruation.

Periodnoun

A section of an artist's, writer's (etc.) career distinguished by a given quality, preoccupation etc.

Periodnoun

Each of the divisions into which a school day is split, allocated to a given subject or activity.

Periodnoun

Each of the intervals into which various sporting events are divided.

Periodnoun

The length of time for a disease to run its course.

Periodnoun

An end or conclusion; the final point of a process etc.

Periodnoun

(rhetoric) A complete sentence, especially one expressing a single thought or making a balanced, rhythmic whole.

Periodnoun

(obsolete) A specific moment during a given process; a point, a stage.

Periodnoun

(chemistry) A row in the periodic table of the elements.

Periodnoun

(geology) A subdivision of an era, typically lasting from tens to hundreds of millions of years, see Appendix: Geologic timescale.

Periodnoun

(genetics) A Drosophila gene, the gene product of which is involved in regulation of the circadian rhythm.

Periodnoun

(music) Two phrases (an antecedent and a consequent phrase).

Periodnoun

(math) The length of an interval over which a periodic function, periodic sequence or repeating decimal repeats; often the least such length.

Periodnoun

(archaic) End point, conclusion.

Periodadjective

Designating anything from a given historical era.

Periodadjective

Evoking, or appropriate for, a particular historical period, especially through the use of elaborate costumes and scenery.

Periodinterjection

That's final; that's the end of the matter (analogous to a period ending a sentence).

Periodverb

To come to a period; to conclude.

Periodverb

To put an end to.

Periodnoun

A portion of time as limited and determined by some recurring phenomenon, as by the completion of a revolution of one of the heavenly bodies; a division of time, as a series of years, months, or days, in which something is completed, and ready to recommence and go on in the same order; as, the period of the sun, or the earth, or a comet.

Periodnoun

A stated and recurring interval of time; more generally, an interval of time specified or left indefinite; a certain series of years, months, days, or the like; a time; a cycle; an age; an epoch; as, the period of the Roman republic.

Periodnoun

One of the great divisions of geological time; as, the Tertiary period; the Glacial period. See the Chart of Geology.

Periodnoun

The termination or completion of a revolution, cycle, series of events, single event, or act; hence, a limit; a bound; an end; a conclusion.

Periodnoun

A complete sentence, from one full stop to another; esp., a well-proportioned, harmonious sentence.

Periodnoun

The punctuation point [.] that marks the end of a complete sentence, or of an abbreviated word.

Periodnoun

One of several similar sets of figures or terms usually marked by points or commas placed at regular intervals, as in numeration, in the extraction of roots, and in circulating decimals.

Periodnoun

The time of the exacerbation and remission of a disease, or of the paroxysm and intermission.

Periodnoun

A complete musical sentence.

Periodverb

To put an end to.

Periodverb

To come to a period; to conclude. [Obs.] "You may period upon this, that," etc.

Periodnoun

an amount of time;

Periodnoun

one of three periods of play in hockey games

Periodnoun

a stage in the history of a culture having a definable place in space and time;

Periodnoun

the interval taken to complete one cycle of a regularly repeating phenomenon

Periodnoun

the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause;

Periodnoun

a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations;

Periodnoun

a unit of geological time during which a system of rocks formed;

Periodnoun

the end or completion of something;

Frequencynoun

(uncountable) The rate of occurrence of anything; the relationship between incidence and time period.

Frequencynoun

(uncountable) The property of occurring often rather than infrequently.

Frequencynoun

(countable) The quotient of the number of times n a periodic phenomenon occurs over the time t in which it occurs: f = n / t.

Frequencynoun

(statistics) number of times an event occurred in an experiment (absolute frequency)

Frequencynoun

The condition of returning frequently; occurrence often repeated; common occurence; as, the frequency of crimes; the frequency of miracles.

Frequencynoun

A crowd; a throng.

Frequencynoun

the number of occurrences within a given time period (usually 1 second);

Frequencynoun

the ratio of the number of observations in a statistical category to the total number of observations

Frequencynoun

the number of observations in a given statistical category

Frequencynoun

the rate at which something occurs over a particular period of time or in a given sample

Frequencynoun

the fact or state of being frequent or happening often.

Frequencynoun

the rate per second of a vibration constituting a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light)

Frequencynoun

the particular waveband at which radio signals are broadcast or transmitted

Frequency

Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as temporal frequency to emphasize the contrast to spatial frequency, and ordinary frequency to emphasize the contrast to angular frequency.