Where can you find info on these (i.e. who the candidates were, how many votes each one got, etc)? Wikipedia only has info on a handful of them.
1993: Howard challenges Hewson, Hewson wins 47-30. In this election Costello loses his first run for deputy (made vacant by Reith's resignation) 45-33.
That spill came after an election and it is customary for leadership positions to be declared vacant after an elections.
Reith did not resign, he recontested the deputy's job but was eliminated in a ballot before the final round.
