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it lasted for two years is the most popular phrase on the web.

it lasted two years 1122,000 results on the web	it lasted for two years 1612,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
1998 It lasted two years. We'd meet from 6 to 8 P.M. It lasted what... two years? and another which will be in force until 2004. 1999 The option provided for in the second subparagraph is only available for Member States in which the training of general practitioners lasted two years as of 1 January 2001. Mr President, Community cooperation in the field of civil protection began in 1985 and included two programmes, one which lasted two years Surprised he lasted two years inside.	It lasted what... two years? and another which will be in force until 2004. It lasted two years. We'd meet from 6 to 8 P.M. 1999 Mr President, Community cooperation in the field of civil protection began in 1985 and included two programmes, one which lasted two years Surprised he lasted two years inside. This period has lasted for two years. 1998

it lasted two years

1122,000 results on the web

it lasted for two years

1612,000 results on the web

More popular!

1998
It lasted two years. We'd meet from 6 to 8 P.M.
It lasted what... two years?
and another which will be in force until 2004.
1999
The option provided for in the second subparagraph is only available for Member States in which the training of general practitioners lasted two years as of 1 January 2001.
Mr President, Community cooperation in the field of civil protection began in 1985 and included two programmes, one which lasted two years
Surprised he lasted two years inside.

It lasted what... two years?
and another which will be in force until 2004.
It lasted two years. We'd meet from 6 to 8 P.M.
1999
Mr President, Community cooperation in the field of civil protection began in 1985 and included two programmes, one which lasted two years
Surprised he lasted two years inside.
This period has lasted for two years.
1998