Hi there, I'm working on a sweatter and I do not understand part of the pattern at all. The pattern says "Dec 1 st each end next row, then 1 st each end foll 4th rows, 5 times more." I already decreased one stitch at each end on two rows, but now I'm lost. Am I supposed to knit 3 rows and decrease on the 4th row, or am I supposed to knit 4 rows and decrease on the 5th row? Please help!!