260 (approximately)
There are 52 weeks (approximately) in a year
A fortnight is two weeks
52 / 2 x 10 = 260
There are 182 fortnights in seven years.
2 years = 52.1494708995 fortnights.
4 years = 104.2989417989 fortnights.
Two years is about 52.2 fortnights.
78, if you do not overlap.
17 years is 443.51 fortnights.
About 104.36 fortnights in four years.
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.
394
78, if you do not overlap.
5
about 22 fortnights