“Repetition” fundamental in Philosophy of Organism: A question from Chapt. V

In chapter V Whitehead emphasizes that Hume needs the notion of “repetition” as a “standard of propriety” to determine which simple ideas “are most proper to be united into a complex one” (p.133), and that “Hume’s philosophy is pervaded by the notion of ‘repetition'” (p.136) Later (p.137) he states that in “the organic philosophy the notion of repetition is fundamental.”

I know little of Hume and I am not sure I fully understand either of these claims but my primary question is on the latter.

Does ANW see “repetition” as fundamental to the organic philosophy in the form of:

(a) the repetition of dipolar cycling from physical pole to mental pole in concrescence, or

(b) the repetition (though not simple replication) an objectified prior actual entities into a concrescing one, or

(c) something else entirely…

I would appreciate any of your thoughts here or on Sunday. I hope to wrench my schedule into being able to attend.

thanks
Daryl