Sleeve pattern question

first time reading a pattern and I don’t under stand the following;

K2, ‘M1’ knit to last 2sts ‘M1’, K2.
Continue stocking stitch st, inc (as before) at each end of foll 8th rows until there are 57 sts, then foll 10th row until there are 61 sts

This all gets easier the more patterns you look at.
If you call the increase row (K2, ‘M1’ knit to last 2sts ‘M1’, K2) row 1, then increase on rows 9, 17,25,33,41 etc until you get to 57 sts. After that increase on the 10th and 20th rows to bring you to 61sts.