He comes home once in a month.

他一个月回家一趟。

youdao

Bank shall hold a customer service committee meeting once in a month.

银行应当每个月举行一次客户服务委员会会议。

youdao

People get out of his way when he appears once in a twelve-month down here among us.

只要他一年一次在我们这儿出现，人们就会故意避开他。

youdao

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

So after about a month, I started to, once in a while, experience some envy toward David.

一个月后，我开始偶尔，对David产生一种嫉妒。

哈佛公开课 - 幸福课课程节选

And once each month, mail would arrive in California after a slow trip by wagon from Saint Louis,Missouri.

VOA: special.2009.05.28

In the seven years since Mark Zuckerberg started Facebook in his Harvard dormitory, Facebook has moved from a closed social networking service available to college students to a place where one seventh of the world's population logs in at least once a month.

NPR: As Facebook Matures, Is It Losing Its Edge?

My father, who I barely knew -- I only met once for a month in my entire life -- was said to be a non-believer throughout his life.

WHITEHOUSE: National Prayer Breakfast

Thirty-eight percent of residents aged 15 to 35 reported going to the movies at least once a month in 2010, and the year prior saw a total of 28.8 million visits to the movies, impressive for a population of just 4.5 million.

BBC: The evolution of Irish cinema