DE 4318 then 4Y 900 at Frankfurt
Zurich → Frankfurt am Main → Dubrovnik
Timetable, Frankfurt am Main time
12:35DE 4318 from Zurich at the gate
09:204Y 900 to Dubrovnik leaves the gate
20 h 45 apart on the timetable, overnight
4Y 900 leaves 20 h 45 after DE 4318 arrives on the timetable: more than half a day, so not a connection we count.