“This motif is made on a background of stockinette, garter stitch, or moss stitch.”
The swatch in the book shows 7 stitches of stockinette between each repeat horizontally. (That is, the repeat becomes 9 + 7 stitches.
Mon Tricot 900 Stitches Patterns p71
Shown with a cast-on count of 18 stitches.