My opinion is you'll never know until you try.

Just this past summer, i worked out twice a day, 6 days a week. I noticed some good gains.
Now i'm in college, sometimes it takes 2 weeks to work out my entire body once, but i'm still noticing gains.

My personal opinion is if u want something to get big, do it first in your workout, but i really think the best thing to do is just create an entire workout where u just concentrate on that part and put full intensity in it. Also work it out first thing in the week when u're fresh. Also mix up the exercises and order in which u do them every workout. About once every month i would do a shock workout where u just go allout crazy on it. These are only a few suggestions, there are several other things u can do.