Yes, once a week for each body part, but I gained most of that muscle about 7-8 years ago when I trained w/a college football player. You'd be amazed at how much more you can lift when you have someone to spot you. Anyway, back then I trained each body part twice a week, now just once b/c of schedule changes.
And yes, I do focus on strength. I LOVE weight training. I still get a little sore after my workouts, especially legs b/c it's so intense. But that's the fun of it, right?