Understanding a pattern

Hi…I’m new to knitting and knitting a jumper for grandchild
What does it mean knit 17 rows garter st , increase at each end of foll 6th rows twice. Thanks

Knit each row for 17rows. Increase at [I]each[/I] end on rows 23 and 29 (4sts increased).
Can you give us a pattern name or a link to the pattern. please?