I saw some charts of Test E vs C rate of rise and drop. both spike hard within 24hrs, then slowly fall at 1st, then drop rapidly by about day 5. E lasts a bit longer, but not that significantly on the charts I saw.
(it was on Jose Antonio or Miachel Mooney's Medibolics, cant remember which one)
I like 2 x wk if Im serious. Often Im just runin a low HRT dose these days.
Depending how much, and how long your taking it, your geting a buildup effect till reach what they call a
"steady State level" (if dose stayed same and consistent). How much U doin per wk? If only a couple hundred or so, Id not split it.