Easy Ripple Afghan - Free Crochet Pattern - Handcrafting With Love

Hello,
I was wondering if someone could help me with a swatch for the afghan I am trying to make. I seem to always get confused with the swatch width and most of my projects show the result of not measuring correctly.
For the pattern listed above, I chained 36 stitches and followed directions for row 1 and 2 and then continued with row 2 as directed.
The pattern indicates 8 rows = 4 inches which I understand, but also has 1 pattern repeat is 3.75 inches wide. Here lies the problem..what is considered 1 pattern repeat? How many stitches would I be counting to determine that? I am trying to measure from point to point on the afghan, but I don't think that is correct and I'm done with guessing and ending up with disappointing projects.
I would appreciate any help you could offer. I know this is probably a silly question but since it is the foundation of any project, I figure it's time I start off right.
Thank You