Need Help understanding Directions for A Diamond Pattern

I am starting on a sweater with a diamond pattern and need help understanding the beginning.
“Begin diamond pattern, working 13 stiches at end of every right side:
Row 1: K3, CB, CF, Knit 4 (then repeat K4, CB, CF, K4) Knit to last 13 stiches. Knit 4, CB, CF, K3”

I don’t understand these directions for doing the first and last 13 stiches on the row. I know CB and CF mean cable back and cable forward, but don’t quite understand how to do this over the 13 stiches.
Would greatly appreciate the help to understand.

What is the pattern name/number?
Is there a note, perhaps near the beginning of the pattern, which describes CB and CF? Cables can be of varying widths and sometimes in patterns this abbreviation is described in the notes giving how many stitches are used.
For example CB may be slip 2 stitches to cable needle, hold in back, work 1 stitch then work 2 from cable needle. This would use 3 stitches which would make sense for the stitch count given.

Thanks very much for your response!
The Pattern is C470_Crucci_292_Ladies_Mohair_Cardigan.
The only note I can see is related to the directions for the Diamond Pattern which is a 14 stitch repeat which is supposed to be knitted in-between the first and last 13 stiches of the rows.
It says:
Row 1 - K4, CB - (by sl next st on CN and leave at back of work, K next 2 sts, K st from CN) - CF (by sl next 2 sts on CN and leave at front of work, K next st, K2 sts from CN), K4

Given this and your suggestion above, I think I do understand that the “CB” and “CF” actually covers 3 stiches and that I can now see how it adds up to the directed 13 stiches.

I am an experienced knitter, but I was just really confused by missing this link within the directions–it’s almost too abbreviated, but i think I got it now!

Thanks again!

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That’s it.
The cable is the same across the row apart from just the first and last stitches which are k3 rather than k4 making the 13 stitches rather than 14.

Glad you’ve managed to work it out.