Is twice a week for each muscle group enough to make gains?

My current workout schedule is like this:

MON - abs
TUE - Chest / Shoulders
WED - Legs
THU - Arms / Back
FRI - Chest / Shoulders
SAT - Legs
SUN - Arms / Back

Yes it's enough
No you need more
It's too much
Select gender and age to cast your vote:
Is twice a week for each muscle group enough to make gains?
Post Opinion