не раз

more than once

→ не
phrase Uncommon #23,389
more than once Means repeatedly or on multiple occasions; often emphasizes that something has happened several times.
RU: Я не раз бывал в Москве.
EN: I've been to Moscow more than once.

Тебя не раз предупреждали.

You’ve been warned more than once.

Ну, я уже не раз просил его прекратить, но он не слушал.

Well, I had already asked him to stop several times, but he wouldn’t listen.

— Форма голоса (2016)

Я не раз видел.

I've seen it more than once.

— Властелин колец: Возвращение короля (2003)

Я уже не раз говорил об этом.

I've already said this several times.