Between the 30th of June 2010 to the 17th of April 2013, when this question was asked, there were 73 fortnights.
Up to the 9th of December 2013, there have been 80 fortnights since the 4th of November 2010.
about 22 fortnights
There can only be 2 fortnights in a month, especially since there are 14 days in a fortnight. This means 2 fortnights are the equivalent of 28 days. Since there are a minimum of 28 days and a maximum of 31 days in a month, there can only be 2 fortnights in a month.
There are 26 fortnights in a year.
17 years is 443.51 fortnights.
About 104.36 fortnights in four years.
Two years is about 52.2 fortnights.
There are 182 fortnights in seven years.
4 years = 104.2989417989 fortnights.
2 years = 52.1494708995 fortnights.
26 fortnights plus one day
130 fortnights in 5 years.