One more thing, nowadays it is available in SL class only after covid. Before covid time it was available in upper class also.
Rule:-
A passenger with single journey ticket for 600 kms. wants to break his journey at 501 kms (Permitted once for 2 days maximum)
A passenger with single journey ticket for 1050 kms. wants to break his journey at 400...
more... kms. and 801 kms.(Only one break journey at 801 kms. is permitted for 2 days maximum)
A passenger with single journey ticket for 2000 kms. wants to break journey at 800 kms., 905 kms. and 1505 kms. (Two break journeys permitted as per choice of passenger at the rate of two days maximum at each point of break of journey)