They've got two houses.
I spent two years in Ethiopia.
It's two o'clock.
He'll be two (years old) in February.
I go to college two days per week. (Skills for Life (Entry 1); A1; Polish)
We will spend a day or two in Boston.
Mom said I can bring a friend or two with me.
I'd like to ask our guest of honor to say a word or two.
The thing you can do, is go out with your family first and than with your friends, or, you can ask your parents, if you can invite a friend or two to go with you. (Preliminary English Test; B1; Spanish)
I was of two minds about whether to invite him to the wedding.