AA 5198 then AA 6445 at Charlotte
Nashville → Charlotte → Knoxville
Timetable, Charlotte time
17:40AA 5198 from Nashville at the gate
15:35AA 6445 to Knoxville leaves the gate
21 h 55 apart on the timetable, overnight
AA 6445 leaves 21 h 55 after AA 5198 arrives on the timetable: more than half a day, so not a connection we count.