TWO MINUTES SLEEP or TWO MINUTES' SLEEP?
• I only need ten minutes sleep, please. (non-standard) ✔I only need ten minutes’ sleep, please. (standard) Whenever we talk about duration, value, distance or length and any of these takes possession of another noun, the possessive marker ’s or s’ is used as determined by the number ( singular or plural) of the possessive noun. Below are some examples: I need just a minute's rest. We actually enjoyed the one month’s holiday. The book is just two dollars' worth of reading. My wife gave me a week’s worth of massage. From here to Lekki is five hours’ drive.