clerking vs clerk

clerking and clerk both are nouns.

Word	Noun	Adjective	Verb	Adverb
clerking	Yes	No	No	No
clerk	Yes	No	Yes	No

clerking (noun)	clerk (noun)
the activity of recording business transactions	an employee who performs clerical work (e.g., keeps records or accounts)
	a salesperson in a store

clerking (verb)	clerk (verb)
	work as a clerk, as in the legal business