You'll have to be more specific. Is it for a monophonic stream of MIDI notes out?

If so...take a look at [prob] or [coll]. You can use [prob] to create weighted probability tables to control choice-making for, say, a melody. The higher the probability that a state (corresponding to a unique note) will trigger itself, the higher the probability of repetition.

Or you can manually weight a [coll] and retrieve its contents with [urn] or [random].

What is it you're trying to do?

i'm trying to control different scales made with midi notes and i want to control repetition's number for each,thanks for your help!