1. Set a period of time.
Kua tātuātau te ‘akavānui i tāna utunga.
The judge sentenced him to a period in jail;
Kua tātuātau‘ia tōna no‘o‘anga ki te reira ‘are.
He was given a certain period during which he might live in the house.
2. By time, on a time basis.
‘E ‘anga‘anga tātuātau tāna.
He is on shift work, or he is engaged for a fixed period.