well when you're PCT'n, I don't think that's counted as "on."
Most people's PH/DS cycles are identical in length to their PCT, so waiting the amount of time from cycle + PCT would usually = 2x on if you think about it.
ie...Take PPlex for 4 weeks, PCT 4 weeks = 4 weeks on. This means wait 8 weeks after last day of PCT before starting another cycle. Even then, that's 1 cycle every 4 months, or 3 cycles a year. That can be some heavy duty ass-beatin your system is taking.