I dont exactly know what else you do, but if you intend to train other parts of yourself as well, consider basing your workout around exercises that use multiple groups like benching, dips, military press etc. They are very effective at building up the triceps as well.
As for how long it takes to see results, I would say a couple of months. Depends of course on a number of factors (sex, age, bodyfat percentage, etc).
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