QP 1158 then SG 488 at Mumbai
Cochin → Mumbai → Kolkata
Timetable, Mumbai time
06:50QP 1158 from Cochin at the gate
05:55SG 488 to Kolkata leaves the gate
23 h 05 apart on the timetable, overnight
SG 488 leaves 23 h 05 after QP 1158 arrives on the timetable: more than half a day, so not a connection we count.