Interim and incompetent aren't the same thing. Do you need to be schooled in the art of dictionary too?
1: Liberal: Alexander Mackenzie 7 November 1873 - 8 October 1878,
5 years
2: Liberal: Sir Wilfrid Laurier 11 July 1896 - 6 October 1911,
17 years
3: Liberal William Lyon Mackenzie King 29 December 1921 - 29 June 1926 ………..25 September 1926 6 August 1930 23 October 1935 15 November 1948
21 years
4: Liberal Louis St. Laurent 15 November 1948
5 years
5: Liberal Lester B. Pearson 22 April 1963 20 April 1968
5 years
6: Liberal Pierre Trudeau 20 April 1968 4 June 1979 ----3 March 1980
30 June 1984
15 years
7: Liberal John Turner 30 June 1984 2 ½ months Interim
8: Liberal Jean Chrétien 4 November 1993
12 December 2003
10 years
9: Liberal Paul Martin 12 December 2003 6 February 2006
3 years Liberal interim
were do you see 5 interims Martin as an interim outstayed the Conservative interims By two years.