'Appointed' in the Bible

Paul, an apostle (not commissioned and sent from men nor through the agency of man, but through Jesus Christ—the Messiah—and God the Father, who raised Him from the dead),

(for he who appointed Peter to the apostleship of the circumcision appointed me also to the Gentiles);

Why, then, the Law [what was its purpose]? It was added [after the promise to Abraham, to reveal to people their guilt] because of transgressions [that is, to make people conscious of the sinfulness of sin], and [the Law] was ordained through angels and delivered to Israel by the hand of a mediator [Moses, the mediator between God and Israel, to be in effect] until the Seed would come to whom the promise had been made.

But is under tutors and governors until the time appointed of the father.

Let us not grow weary or become discouraged in doing good, for at the proper time we will reap, if we do not give in.