に渡って

over; throughout; across

→ に
phrase Rare #33,969
over; throughout; across Used after a period, area, or range to indicate that something extends across it. Often written にわたって. The related expression に渡る can also mean “to be handed over” or “to pass to,” depending on context.
JA: この問題は数年に渡って議論されてきた。
EN: This issue has been discussed over several years.

今日ではの値段は広い範囲に渡っている

Nowadays, car prices span a wide range.

彼は生涯に渡って貧しい人々を助けた

He helped poor people throughout his life.

彼の提案は一年間に渡って議論された

His proposal was discussed over the course of a year.

トムバッド政府に渡ってお屋敷私たちのものですよね

Even if Tombad is handed over to the government, the mansion will still be ours, right?

— तुम्बाड (2018)