It means on rows 3 and 8, and then every 5th row after that, so it would be 3, 8, 13, 18, 23, etc.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry