Mam, 5 mins halt at ptkc seems logical but 31 mins doesn't seem relevant. This is bcoz ptkc is a very small station with only defence importance. It has just 3 pfs and no facilities like water filling or a crew change or a LC. So 31 mins seems totally illogical , rather 5 min seems good.
Moreover, no train stops more than 10 mins in PTKC.
I hope u got my point mam