"I don't think that will bother you much now," she whispered, fleetingly.
Calliope looked at me fleetingly, as if she were measuring my ability to understand.
Valiant was the flier, but far mightier he who fleetingly pursued him.
He kissed her briefly, fleetingly, and returned to the paper.
Only fleetingly visible for a while, she finally seemed to have sunk into the earth.