AA 5198 then AA 6120 at Charlotte
Nashville → Charlotte → Harrisburg
Timetable, Charlotte time
17:40AA 5198 from Nashville at the gate
16:50AA 6120 to Harrisburg leaves the gate
23 h 10 apart on the timetable, overnight
AA 6120 leaves 23 h 10 after AA 5198 arrives on the timetable: more than half a day, so not a connection we count.