There are some (very old but still relevant) books on archive.org about motor (re)winding, but if you are rewinding an existing armature then just follow the pattern it had from before.
That picture you attached doesn't provide a lot of info in any case, and what it does can easily be guessed: 7 segments, 7 coils, skip 2 slots between each coil, 1 coil per segment (simplex lap winding.)