The Wishbone cable is knitted over a multiple of 12 stitches. One group of six, 3 stitches are cabled to the right and the other group of stitches 3 stitches are cabled to the left.
Knit 10 rows and repeat. If, the number of rows are too close then the wishbone won’t show up.
Note: when viewing the cabling, the upside is the same as the downside.
This particular project was handknit and could easily be made on the knitting machine. I added 2 stitches to each edge of the scarf to limit rollover and knit those in garter stitch.
The yarn is a wool/alpaca/mohair mix. Very nice on the hands.