List of NHL playoff series

Columns: Opponent | S | Occurrences | GP | Rec | %
Montreal Canadiens | 16 | 1930 , 1932 , 1933 , 1935 , 1950 , 1956 , 1957 , 1967 , 1969 , 1972 , 1974 , 1979 , 1986 , 1996 , 2014 , 2017 | 73 | 9-7 | .562 | Philadelphia Flyers | 11 | 1974 , 1979 , 1980 , 1982 , 1983 , 1985 , 1986 , 1987 , 1995 , 1997 , 2014 | 54 | 5-6 | .455 | Boston Bruins | 10 | 1927 , 1928 , 1929 , 1939 , 1940 , 1958 , 1970 , 1972 , 1973 , 2013 | 47 | 3-7 | .429 | Washington Capitals | 9 | 1986 , 1990 , 1991 , 1994 , 2009 , 2011 , 2012 , 2013 , 2015 | 55 | 5-4 | .556 | Toronto Maple Leafs | 8 | 1929 , 1932 , 1933 , 1937 , 1940 , 1942 , 1962 , 1971 | 35 | 5-3 | .625 | New York Islanders | 8 | 1975 , 1979 , 1981 , 1982 , 1983 , 1984 , 1990 , 1994 | 39 | 3-5 | .375 | Pittsburgh Penguins | 7 | 1989 , 1992 , 1996 , 2008 , 2014 , 2015 , 2016 | 37 | 2-5 | .286

Example questions:
What is the number of seasons in which the NY Rangers 's playoff opponent was founded in 1917 ? | What is the number of seasons in which the NY Rangers 's playoff opponent was founded in 1972 ? | What is the number of seasons in which the NY Rangers 's playoff opponent played their home games on Broad Street since their inception ? | What is the number of seasons in which the NY Rangers 's playoff opponent is frequently referred to in English and French as the Habs ? | What is the number of seasons in which the NY Rangers 's playoff opponent has been in existence since 1924 ?

Answers:
8 | 8 | 11 | 16 | 10