attending vs attendance

attending and attendance both are nouns.

Word	Noun	Adjective	Verb	Adverb
attending	Yes	Yes	No	No
attendance	Yes	No	No	No

As nouns, attending and attendance are synonyms defined as:

attending and attendance: the act of being present (at a meeting or event etc.)

attending (noun)	attendance (noun)
the act of being present (at a meeting or event etc.)	the act of being present (at a meeting or event etc.)
the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others	the number of people that are present
	the frequency with which a person is present

attending (adjective)	attendance (adjective)
giving practical help to