Biennially vs. Biannually
Bienniallyadverb
Taking place every two years
Bienniallyadverb
Once in two years.
Bienniallyadverb
every two years;
Biannuallyadverb
Taking place twice per year, semiannually.
Biannuallyadverb
Taking place every two years, biennially.
Biannuallyadverb
twice a year;
