Considereing the fact that the Redskins are still a team you should phrase your question like this: How many times have the Redskins won the Super Bowl? Thew answer is 3 with wins in 1982 (XVII), 1987 (XXII), 1991 (XXVI).
The Redskins have won the Super Bowl 3 times.
The Redskins have been to the super bowl 5 times , but only won 3 ( Super Bowls XVII, XXII, and XXVI.)
The redskins have been to five super bowls and won three.
The Washington Redskins have won the Super Bow 3 times (1983, 1988, 1992).
The Redskins went to the superbowl 5 times and won 3 out of the 5 times.
The Washington Redskins won three (3) Super Bowls (1982, 1987, 1991).
5 times but they only won 3 times