My experience has typically been that I can see the points increase in my total 2 days after checkout, and then the posting shows up a day later in my account. This is often over a weekend, so it's not just occurring on business days. I do find that certain locations are a bit slower on this, though.

As for holding on to your folio, you can also set up your MR account to automatically email you the bill. I've found that this usually aligns with when the points post, so bill received via email = points posted.