In the end, they are permitted to meet just once a year, on the seventh day of the seventh lunar month.

VOA: special.2010.02.08

We would only meet each other once or twice a week.

我们会一周见个一、两次。

The thing is 实战 - SpeakingMax英语口语达人

"Wouldn't you like to go meet Missus Trotter once before we leave?"

VOA: special.2010.04.24

For once,I will meet you half-way.

VOA: special.2010.04.24

Some were told to meet with a counselor once a month.

VOA: standard.2010.07.30