If it's not ready, boil for a few minutes more and test again.
No longer than a man might need to boil water for coffee.
The mixture had to be boiled for a year and a day.
Put the lid on and boil for a couple of minutes.
If the water is of suspect quality, boil it for at least five minutes.
Boil for about 10 minutes until they are tender but firm.
You don't have to boil water for the tea or coffee.
Boil for ten minutes and then leave the pan to cool.
"They want to keep the pot boiling for their own benefit."
Put all this stuff to boiling water and let it boil for 15 minutes.