Theoretically you should be able to dose every day for 1-2 weeks before going through any noticable withdrawals. I DO NOT recommend doing this though.
Your best bet would be to just get high once, then put it down for a month. You could honestly get away with much more, but everyone is different, and there is no exact answer on how long it'll take before you start feeling withdrawals. The mental aspect will become apparently first, (as it already has if you are worrying about this already), and the physical addiction will come later.
You are treading on thin ice my friend. I started where you were, thought I could use sparingly, etc, then years later I ended up shooting dope multiple times a day, now I am a slave to the methadone clinic.
Hopefully you will be one of the lucky ones, and sorry for preaching, but don't think it cannot happen to you.