Leaving them running perpetually is a frivolous use of the station's resources.

Is this a frivolous use of military funds?

They all consider the weapon's recovery a top priority, though he thinks it is a frivolous use of his abilities.

But the devices may also have more frivolous uses: in video games, for example.

"That is a rather frivolous use of the Art, surely."

You feared I would make frivolous use of your sigil!

As an example, he mentioned "the frequent frivolous use of priests and religious women in advertisements."

This, however, seems a frivolous use of manpower and something of a waste.

Then the frivolous use of patents to extort money would be curtailed.