3-4 times per wk is usually the max the past few years, but sometimes even less.
In the past like L2H I've done the every day thing and it can get old.
Now I did this several years ago and it was a major pain in the ass...no pun intended. Contest cycle, HGH every morning, so there's 7 pins per wk right there, then my regular daily AAS injections, there's 7 more right there, so we're up to 14 pins per wk. Did that for awhile and after a time I started injecting smaller amounts in each injection, still running the same dose but when I get lean for some reason, a standard 1-2ml injection can start to hurt every single time...no idea why this is but it's always been that way. Anyway, once I reached that point I started splitting my AAS dose into 2 injections per day...both done at the same time but in different spots and smaller amounts in each one...so there you have it, 21 injections per wk...did that for about 6wks. It sucked, it got very old very fast.
Would I do it again? If I had to, if I ever get that lean again and the normal size shots are killing me then yes, I'd split it up more if needed.