You're getting a lot of bullshit and some good advice but this is what I would do. Train your legs once a week but beat the shit out of them. Your legs can take it but they still need time to recover. Train your arms twice a week. Consider the following split:
Mon - Chest and tris
Tues - Back & Bis
Wed - Rest
Thurday - Shoulders
Friday - Bis & Tris
Saturday - Legs
Sunday - Rest
When I say beat the shit out of them I mean do something like the following:
Quad Extensions - 3x20,15,10
Squats 4x15,10,6,6
Leg Press 4x15,10,6,6
Hack Squats 3x15,10,6
Stiff Leg Dead 3x10,8,6
Lying Hamstring Curls 3x15,10,6
Seated Hamstring Curls 3x15,10,6
Seated Calf Raise 4x25
Standing or Donkey Calf Raise 4x25
Hope this helps!