Is "write a diary" natural English? Many teachers say it is incorrect, but the Longman Dictionary of Contemporary English online gives the following collocation:
keep/write a diary (=write regularly in a diary) While I was travelling, I kept a diary every day.
"Write a diary" seems perfectly normal, and there is plenty of usage:
I'm convinced people tell the truth when they write a diary, The Independent
Why I'd never write a diary. (Lucy Mangan in The Guardian)
But see this answer on our sister site, that finds "Keep a diary" is much more common.
Note that you "write a diary entry" to refer to one day.
