Help with shaping armholes

Hello could anyone help explain how to understand the pattern when shaping the armhole. Do it mean increase a stitch after 3 rows then again after 10 4 times or increase a stitch after 3 rows then increase a stitch after 4 rows 10 times?
Any help would be great first time knitting a jumper and following a pattern!

Welcome to KnittingHelp!
Increase at each end of row 3 and then every 4th row. So that would be rows 7,11,15,19,23,27,31,35,39 and 43. Then increase on the 6th row which is row 49.
Remember to increase at each end so it’s 2sts increased per increase row.

Thank you and increase on every 4th row 7 times?

Sorry I meant 10 times as that is the number before the bracket

Yes, for the smallest size it’s every 4th row. Do that 10 times. That’s the rows 7,11,15,19,23,27,31,35,39 and 43.

Thank you very much!