In obsolete|lang=en terms the difference between collection and repeat
is that
collection is (obsolete) the act of inferring or concluding from premises or observed facts; also, that which is inferred while
repeat is (obsolete) to make trial of again; to undergo or encounter again.
As nouns the difference between collection and repeat
is that
collection is a set of items or amount of material procured or gathered together while
repeat is an iteration; a repetition.
As a verb repeat is
(intransitive) to do or say again (and again).