I enjoy working each group twice a week. I don't do as much volume per say, each session, but the intensity is not lacking.
Typically
Monday: Chest, Shoulders, Tris, Abs
Tuesday: Legs, Back, Bis
Wednesday: Off
Thursday: Chest, Shoulders, Tris, Abs
Friday: Legs, Back, Bis
Weekend: Off
I have been doing this for about 8 weeks now and have enjoyed some nice strength gains
But who knows I change my workout plan constantly
-Eazy