recurrence vs repetition

recurrence and repetition both are nouns.

Word	Noun	Adjective	Verb	Adverb
recurrence	Yes	No	No	No
repetition	Yes	No	No	No

As nouns, repetition is a hypernym of recurrence; that is, repetition is a word with a broader meaning than recurrence:

Other hypernyms of recurrence include repeat.

recurrence (noun)	repetition (noun)
happening again (especially at regular intervals)	the act of doing or performing again
	the repeated use of the same word or word pattern as a rhetorical device
	an event that repeats