Something or things that are unimportant
He did not like to combine frivolity with the serious business of hunting.
He displays his own vanity, frivolity and futile cleverness with much unconscious humour, but, it is only fair to allow, with some literary dexterity.
It was at this period that, to use his own words, he "passed per saltum from frivolity to philosophy."
His weak points were his wanton breaches of good faith, his extravagance, his frivolity and his self-indulgence.
He is free from the scholastic trifling and learned frivolity which tainted the rhetorical culture of his century.