usage vs consuetude

usage and consuetude both are nouns.

Word	Noun	Adjective	Verb	Adverb
usage	Yes	No	No	No
consuetude	Yes	No	No	No

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

Other hyponyms of usage include Americanism, Anglicism, Britishism, couvade, Germanism, habit, use, hijab, rite, ritual.

usage (noun)	consuetude (noun)
the act of using	a custom or usage that has acquired the force of law
accepted or habitual practice
the customary manner in which a language (or a form of a language) is spoken or written