Pleeeeeeease help, going nuts here! Help with sweater pattern

Working on sweater (Debbie bliss)back is worked in two halves, with each half getting decreased.
Instructions are given for a decrease row and then it says the following:
Continue in patt, dec in this way at beg of 14 foll 6th rows. Ending with 57 sts (down from 71)
What does this mean??? When do I decrease and how often?? Please translate!!!

Call the first dec row, row 1. Then you would dec on rows 7, 13, 19, 25, 31, 37, etc until you had 14 dec rows and the correct number of sts.

Thanks so much!! Couldn’t for the life of me figure out the wording!