decrease on insert sleeves

[Lilaria]

Hey all,
I am fairly new to knitting. I've done a few scarves and ponchos, and now i decided to start on a sweater. I really love this forum, been reading on it a lot before i decided to take on this project! I am trying to figure out the pattern I decided to try, and so far there is only one thing I don't understand.

It says:
"cast of 7 stitches in the next 4 rows"
Does it mean a few stitches every row (during those 4 rows) so in total 7, OR 7 stitches every next 4 rows so 4x7 = 28 stitches in total decrease?

Thx so much in advance for all the suggestions!