clowning vs frivolity

clowning and frivolity both are nouns.

Word	Noun	Adjective	Verb	Adverb
clowning	Yes	No	No	No
frivolity	Yes	No	No	No

As nouns, clowning and frivolity are synonyms defined as:

Other synonyms of clowning include buffoonery, harlequinade, japery, prank.

clowning (noun)	frivolity (noun)
acting like a clown or buffoon	acting like a clown or buffoon
a comic incident or series of incidents	something of little value or significance
	the trait of being frivolous; not serious or sensible