Fourteen nights, a.k.a. two weeks
A fortnight is a period of two weeks. It is commonly used in British English.
14 days (2 weeks)
I sleep every night, so every one of the 52 weeks!
There are 26 fortnights in a year, with each fortnight comprising 14 days.
A fort-night is 2 weeks, so 42.
A fortnight consists of 14 days.
Relevant answers:How_does_pizza_hut_employee_payroll_system_workHow_does_pizza_hut_employee_payroll_system_workEvery 2 weeks on Thursday night after midnight, the week starts and ends on Tuesday every 2 weeks. So the 2 weeks you worked ends on Tuesday and you get direct deposit that Thursday night after...What_systems_work_with_the_respiratory_system
A three dog night is a very cold night in which you need all three of your dogs to keep you warm. Or you could always buy a forth if the it goes below zero.
Guinea pig pregnancy lasts 59 - 72 days (so, about 10 weeks). Birth is given usually over night, and it takes 10 - 30 minutes.
There are two weeks in two weeks.
There are 112 weeks in 112 weeks.