Over and To

Over adjective - Brought or having come to an end.

To and over are semantically related in inside topic. In some cases you can use "To" instead a preposition "Over", when it comes to topics like via, per, for, upon.

To preposition - Earlier than.

Over and to are semantically related in inside topic. You can use "Over" instead a preposition "To", if it concerns topics such as via, per, for, upon.