10/10/20/20 means 10mg a day for the first two weeks and 20mg for the last two weeks.
10/10/10/10/10/10 means 10mg a day for 6 weeks.
You get the idea.
Usually 4 weeks is the average time on, though you can stretch to 6 weeks if you stick with low dose. I would highly recommend using some injectable test at 150-200mg a week at minimum along side the SD.
I would take a solid 8 week break from any orals after using SD, and for sure get blood work done after pct to make sure test is normalized and your liver / kidneys are OK.
That Superdrol will shut you down hard and you won't have any test in your body. It happened to me, bro. You need to be running that with Test, if you HAVE to run it at all. I think a Test cycle at 500 mg EW with a DBOL kickstart would be better. I have said it again and again......go ahead and run real gear. It's safer and you get way more bang for your buck.