You can stop he office every once in a while.

We had stopped once in the night to gas up.

The boys stopped once or twice to make sure they were right.

She never once stopped looking down at the lights of Chicago.

If you want to take that kind of flight, you're going to have to stop at least once.

She would have to stop once and go to the bathroom.

She stopped once to listen, but it was just the rain again.

When driving, stop once an hour to stretch and walk.

The car with the hostages was not stopped once along the way.

"The one who once stopped you from destroying the world."