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As of now (Sept 2016), 12 times in 77 years.
5 times: 1985, 1991, 1996, 2002 and 2013.
12 times in the years 1937, 1943, 1948, 1954, 1965, 1971, 1976, 1982, 1993, 1999, 2004 and 2010. The next one will be in 2021.
Any month starting on a Sunday will have a Friday the 13th as well as 5 Sundays... except February where that rule becomes a little wobbly and only happens about every 28 years... or something like that.
September 13 fell on a Friday four times between 1981 and 2012, in 1985, 1991, 1996 and 2002.