weekly drip feed content question

I'd like to Schedule Selected Content on a weekly basis in a members area (I'm using wishlist but don't want to set up numerous membership levels).

Monthly & One time options seem to work but weekly, not so much...

I'd like to release content on let's say Sunday, 7 to 10 days after they've signed up. Then content would be available everyday from that point for a year let's say

HELP!
THX