it depends if your taking anything, roids, PH, or just legal stuff. if the first two then 2 times a week is an option. if legal stuff like creatine then maybe you want to just keep it 1 part every 5 days. at most this way you could hit one body part twice a week. example;
Mon - legs
Tue - chest/bis
wed - back/tris
thur - shoulders
fri - rest
sat - legs
sun - chest/bis

or add 2 rest days.. I'd only do this for 2 months max.. but you might to be able to do it for longer. just remember you should take a week off after 3 months max.. so your body can rest and regroup.. and you could take this time to change up your routine.