List of NHL playoff series

Columns: Opponent | S | Occurrences | GP | Rec | %
Philadelphia Flyers | 9 | 1975 , 1978 , 1995 , 1997 , 1998 , 2000 , 2001 , 2006 , 2011 | 50 | 3-6 | .333 | Boston Bruins | 8 | 1982 , 1983 , 1988 , 1989 , 1992 , 1993 , 1999 , 2010 | 45 | 2-6 | .250 | Montreal Canadiens | 7 | 1973 , 1975 , 1983 , 1990 , 1991 , 1993 , 1998 | 35 | 3-4 | .429 | Ottawa Senators | 4 | 1997 , 1999 , 2006 , 2007 | 21 | 3-1 | .750 | New York Islanders | 4 | 1976 , 1977 , 1980 , 2007 | 21 | 1-3 | .250 | Dallas Stars | 3 | 1977 , 1981 , 1999 | 13 | 1-2 | .333 | Chicago Blackhawks | 2 | 1975 , 1980 | 9 | 2-0 | 1.000 | New York Rangers | 2 | 1978 , 2007 | 9 | 2-0 | 1.000 | Vancouver Canucks | 2 | 1980 , 1981 | 7 | 2-0 | 1.000

Example questions:
How many NHL playoff series with the Buffalo Sabres occurred for the opponent team that has been in existence since 1924 ? | How many NHL playoff series with the Buffalo Sabres occurred for the opponent team that is owned by Mario Lemieux and Ronald Burkle ? | How many NHL playoff series with the Buffalo Sabres occurred for the opponent team that is frequently referred to in English and French as the Habs ? | How many playoff series with the Buffalo Sabres occurred for the opponent team that was founded during the 1967 NHL expansion ?

Answers:
8 | 2 | 7 | 3