Whats the best posting schedule for instagram?

Im trying to start making instagram theme pages, so I want to post reels, carosels, etc and stories. What do you suggest works the best, on aged accounts. maybe some new. Also whats the max amount to post.

Reels, carousels, posts. 3/day. Aged account if possible. @ceozac has some good tips

best place to get aged accounts?