Correction: while Josh Frydenburg was deputy Liberal leader and Treasurer under Scomo, the Deputy Prime Minister was not Josh Frydenburg. Depending on when during the time he was Prime Minister, it was either Michael McCormack or (later on) Barnaby Joyce, because in a Coalition government the Liberal leader becomes PM/Premier while the Nationals leader becomes Deputy PM/Deputy Premier. However in Opposition, the Liberal leader becomes the Opposition Leader but the Nationals leader does not normally become Deputy Opposition Leader (the Deputy Opposition Leader when the Coalition is in Opposition is usually the deputy Liberal leader).