We need to resolve this issue for once and for all before it causes more problems.

Teachers often correct students who write once in awhile, explaining that it's a misspelling of once in a while.

They ran several once-overs of the presentation slides to ensure everything looked polished.

I try to clean out my closet once and a while, but it never stays organized.

We stopped at Once Brewed to rest in a small tea room before continuing our walk along Hadrian's Wall.

Legends say that once upon a time a great storm shaped the coastline we know today.

I visit my hometown once in a blue moon, usually only for special family events.

I treat myself to a slice of cake every once in a while to celebrate small victories.

Alright team, once more into the breach — we have a deadline to meet and no time to waste.

She goes to the theater once in a purple moon, when she finds a free evening.