Theatrical version on cable TV and VHS: at least three, maybe four.
Director's Cut: Twice on VHS, three times on DVD.
Uncut Version: Well, I watched it regularly at least once a month, either in one sitting or one hour a day, so probably fifteen times, possibly as many as twenty.
On the other hand, since I haven't had a place to call my own, I haven't watched in in a year-and-a-half now (coincidentally the same length of time it's been since I played SH3).
That's okay, though, I have a great memory and something to look forward to.