About 104.36 fortnights in four years.
17 years is 443.51 fortnights.
Two years is about 52.2 fortnights.
2 years = 52.1494708995 fortnights.
There are 182 fortnights in seven years.
4 years = 104.2989417989 fortnights.
130 fortnights in 5 years.
3 years = 1095 or 1096 days = 1095/14 or 1096/14 fortnights = 78.2 or 78.3 fortnights.
56 days.
394
78, if you do not overlap.
5
about 22 fortnights