This period was known as the "Golden Age (metaphor)" by the FCZ faithful. At this time, the club was run by the legendary President Edwin Nägeli and had players such as Köbi Kuhn, Fritz Künzli, Ilija Katić, René Botteron, and many more. Zürich won seven Swiss Super League in the years 1962-63 Nationalliga A, 1965-66 Nationalliga A, 1967-68 Nationalliga A, 1973-74 Nationalliga A, 1974-75 Nationalliga A, 1975-76 Nationalliga A and 1980-81 Nationalliga A. They also won the Swiss Cup five times in 1966, 1970, 1972, 1973, and in 1976. FCZ also had some success in Europe getting to the semi-finals of the European Cup 1963-64, before losing to Real Madrid C.F. and also reaching the semi-finals in the European Cup 1976-77, where they lost to Liverpool F.C..
Question: How many times did Zürich win the Swiss Cup in the 1970's?
Answer: 4