George Stone/Stick Control - Need Help!

[drum_chick]

OK, so I got the Stick Control book by George Stone, in the beginning it says the author recommends doing each rhythm 20 times. Then the next paragraph says it's also recommended to do the rhythm at several different speeds? So now I'm confused, do I do it at several different speeds 20 times or what? Or should I just do it, increasing the speed until I can do it comfortably 20 times and then move to the next rhythm? AHHHHH, HELP!