3by1 or 2by2. So, 3x your intended dose for one week which would mean if you intended to run eq at 600mg/wk, then a 3by 1 would be a 1 week frontload at 1800mg. 2by2 would be double the dose for two weeks so if you planned on running eq at 600, you would frontload 1200mg for 2 weeks.