раз в

once every

→ раз

phrase Common #4,380

once every Followed by a time interval, as in «раз в два месяца» (“once every two months”).

RU: Я проверяю почту раз в час.

EN: I check my email once every hour.

I go to the dentist once every two days.

God be with you, once every six months.

— Radio Day (2008)

The postman comes once every three days.

But sometimes a strange child is born once every few generations.

— Дом странных детей Мисс Перегрин (2016)

Tom visits us once every hundred years.

I change my toothbrush every three months.

This happens once in a hundred years.

Tom comes to Boston every two months.

Trains run every two hours.

— Твоё имя (2016)

She goes to the supermarket once every three days.

Once in a lifetime.

— Славные парни (1990)

I go home to Boston once every three months.

We meet once every three weeks.

You only experience something like this once in a lifetime.

The train runs every half hour.

And so once every two months.

— Пылающий (2018)