okay i found it! (faster than i ever imagined) I'm going to go with the Body Chart.
Each 10-row repeat of the body chart increases your stitch count by 12 sts on each side, 24 sts total, and the repeat in brackets is indeed 12 sts, so each time you finish 10 rows, you will incorporate one more 12-st repeat into the pattern, so on the second repeat of the chart, you'll have 24 sts in repeated pattern (on each side, repeat 12-st rep twice), third repeat will be 36 (repeat 12-st rep thrice), fourth will be 48, etc.
p.s. the only stupid question is the one you don't ask!!!