List of NHL playoff series

Columns: Opponent | S | Occurrences | GP | Rec | %
New York Rangers | 8 | 1975 , 1979 , 1981 , 1982 , 1983 , 1984 , 1990 , 1994 | 39 | 5-3 | .625 | Washington Capitals | 7 | 1983 , 1984 , 1985 , 1986 , 1987 , 1993 , 2015 | 37 | 5-2 | .714 | Pittsburgh Penguins | 5 | 1975 , 1982 , 1993 , 2013 , 2019 | 29 | 4-1 | .800 | Buffalo Sabres | 4 | 1976 , 1977 , 1980 , 2007 | 21 | 3-1 | .750 | Montreal Canadiens | 4 | 1976 , 1977 , 1984 , 1993 | 22 | 1-3 | .250 | Philadelphia Flyers | 4 | 1975 , 1980 , 1985 , 1987 | 25 | 1-3 | .250 | Edmonton Oilers | 3 | 1981 , 1983 , 1984 | 15 | 2-1 | .667

Example questions:
What is the number of playoff series played by the opponent that has twice advanced to the Stanley Cup Finals ? | What is the number of playoff series played by the opponent that were founded in 1974 as an expansion franchise ? | What is the number of playoff series played by the opponent that are the longest continuously operating professional ice hockey team worldwide ? | What is the number of playoff series played by the opponent that was founded in 1926 by Tex Rickard ?

Answers:
4 | 7 | 4 | 8