residence vs occupancy

residence and occupancy both are nouns.

Word	Noun	Adjective	Verb	Adverb
residence	Yes	No	No	No
occupancy	Yes	No	No	No

As nouns, occupancy is a hyponym of residence; that is, occupancy is a word with a more specific, narrower meaning than residence:

Other hyponyms of residence include lodging, tenancy.

residence (noun)	occupancy (noun)
the act of dwelling in a place	an act of being a tenant or occupant
the official house or establishment of an important person (as a sovereign or president)	the act of occupying or taking possession of a building
a large and imposing house
any address at which you dwell more than temporarily