Three | search | faqs, products, events, locations mobile phones. We need 'in' to connect 'once'. My english teacher was kind enough to let me choose a song for a listening.
We could say 'once in three days'. We might go on day 1 or day 2 or day 3. Hi all, i was wondering what's the difference between three times vs times three.
This means that sometime during the three days we go to the library.