It is worth noting that, if you have the spell slots, nothing is preventing you from:

round 1
Quickened Intensified Time Stop
- 9 apparent rounds of stuff
- 1 round of Intensified Time Stop
-- 9 apparent rounds of stuff
-- 1 round of Intensified Time Stop
--- 9 rounds... etc. etc. until out of appropriate spell slots
Quickened Intensified Time Stop (assuming you still have one)
- 10 apparent rounds of stuff
Intensified Time Stop (assuming you still have one)
- 10 apparent rounds of stuff