For me, it really depends on what I'm going to use the recording for. If I'm going to just listen, as a part of the practicing, it takes 1 or 2.
If I will post in on a forum, I never go above 3 (for me, if it takes more than 3 takes on one time, it wont be any better the 4th)
If it is for an actual audition, I spread it out over a long time, and at least a week, with like 3 takes every day.