It usually takes between 2 to 6 weeks to receive items through ILL.
Most ILL items will come within 2 weeks. However, harder-to-find items occasionally take up to 6 weeks to locate a library who owns the item and is willing to lend it, and for them to ship the item to TRL.
You will be notified when your ILL request is available in the same way you are notified when your TRL holds are available for pickup.