Once a week is all I can muster- I do a M/W/F split and it is a bitch. I do all the basic movements. Squats,Deads,Bench,Militarys,Chins. Everything to failure in the 5-7 rep range. Everything being done w/ free weights (except push-downs, but that is it!)
M - Legs/Abs. W - Chest/Shoulders/Tri's. F - Back/Bi's/Forearm
You get used to the intensity I think as I am only in week 5 of this. I used to train 5 on 2 off w/ each day getting a body part. I have had much better gains on this new program, but I have also overhauled my exercises - I was not doing deads and was not training to failure as a rule. I may look like a fool getting stuck down low and walking out from under the bar while squatting - but that is failure baby!