As promised, I made availaible additionnal data to help compile the time intervals at stops.
The intervals themselves are provided on a stop by stop basis in the stop_times_enrichi.csv file, which contains a single additionnal columns named temps_inter_stop. Pay attention to those time if you use them: the first one is always a missing value since for n locations you can only have n-1 travel times between them.
A second file named stats.csv contains precalculated indicators over grouped objects. The groups were created using service_id, route_id and direction_id. You can use those values once you analysed your 4 lines or recalculate the indicators on your own if you so wish.
Good end of the semester,
Laurent