Ten seconds is ten seconds. If you put the weight down and walk away from the bar, that's a rest. I nearly did so on a heavy double squat. I walked it back in, intending to rack it, but I didn't, so completed the double. Had I got that bar back on the J hooks, rested a few seconds then had another go, I would have counted it as 2 heavy singles. This is useful information in the log. If the OP did 3 then 2, then followed up with a set of 5 there is progress.