time limit 
noun
A limit of time within which something must be done: with this pass you can use the rail system as much as you like within a certain time limit strict time limits...
- However, it did not give Israel a specified time limit within which to respond.
- It was a quiet day and it was easily sorted within the set time limit of five hours without water.
- If the invoice needs to be adjusted downward, he must issue a credit note within the time limit.
Derivatives
time-limited
- This is time-limited, and if it does not go ahead, money will be spent elsewhere.
- Rental, subscription and time-limited trial offers (already used for computer software) are all options.
- ‘He always saw it as a time-limited job for a specific purpose,’ a friend said.