a moment/while
She stopped here for a moment and then continued driving
To the best of my memory, he was a teamster for a while before going abroad
at a time
Thang ran down the stairs two at a time
You can feed this portable typewriter with six flimsies at a time
together; at the same time; at once; simultaneously; concurrently
You both answer together/at the same time, so I understand nothing
He ate all ten bananas at once