3x (6 x 40m) denotes 3 sets of 6 reps of 40m thus 18 reps, not sets.
Regarding the 7 weeks I think that is only available (could be wrong of course) by watching the video.
4 weeks of hills with week 5 as hills on M/F and flat speed work on W, week 6 with two speed days on M/F with hills on W and week 7 with three speed days and one hill day on Sat. replacing tempo on that day.