How long were all the other breaks between seasons?
Season One to Season Two:
May 6, 2011 (Spring) to September 17, 2011 (Fall)
~four months
Season Two to Season Three:
April 21, 2012 (Spring) to November 10, 2012 (Fall)
~seven months
Season Three to Season Four:
February 16, 2013 (Winter) to ???, 2013 (Summer-Fall)
??? months
you can assume around 4-7 months (june 2013 to september 2013).
you could add or subtract months because it ended in February this time, it being half a season. at the same time, Season Four is a full season so maybe not.