repetition vs recurrent event

repetition and recurrent event both are nouns.

Word	Noun	Adjective	Verb	Adverb
repetition	Yes	No	No	No
recurrent event	Yes	No	No	No

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

Other hypernyms of repetition include periodic event.

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