List of NHL playoff series

Columns: Opponent | S | Occurrences | GP | Rec | %
Ottawa Senators | 4 | 2000 , 2001 , 2002 , 2004 | 24 | 4-0 | 1.000 | Pittsburgh Penguins | 3 | 1976 , 1977 , 1999 | 12 | 3-0 | 1.000 | Los Angeles Kings | 3 | 1975 , 1978 , 1993 | 12 | 2-1 | .667 | New York Islanders | 3 | 1978 , 1981 , 2002 | 17 | 2-1 | .667 | New York Americans | 2 | 1936 , 1939 | 5 | 2-0 | 1.000 | Montreal Maroons | 2 | 1932 , 1935 | 5 | 1-1 | .500 | Ottawa Senators ( original ) | 2 | 1921 , 1922 | 4 | 1-1 | .500

Example questions:
How many seasons of the NHL playoff series included the opponent of Toronto that has won six Stanley Cup championships since their founding in 1926 ? | How many NHL seasons included the opponent to Toronto Maple Leafs that was the first expansion team in the post-Original Six era to win the Stanley Cup ? | How many NHL playoff seasons included Toronto 's opponent that is frequently referred to in English and French as the Habs ? | How many NHL seasons included the opponent of Toronto that has won the most Stanley Cup championships of any NHL franchise based in the United States ? | How many seasons included the Toronto Maple Leafs ' opponent that plays its home games at Madison Square Garden in the borough of Manhattan ?

Answers:
9 | 6 | 15 | 23 | 8