clerk vs clerking

clerk and clerking both are nouns.

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

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

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