She always writes me once a month, if only to scold me because I haven't answered her last letter yet.

她总是一个月写一封信给我，即使仅仅是为了责备我还没有回她的上一封信。

《柯林斯英汉双解大词典》

I get my day out once a month same as th' rest.

我和其他人一样每个月有一天的休息时间。

youdao

Peter said joyously, "I do like moving! I wish we moved once a month."

彼得兴高采烈地说：“我喜欢搬家！我希望我们每个月搬一次家。”

youdao

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

I go there like, at least once a month.

我至少一个月会去那里一次。

旧金山的热点 - SpeakingMax英语口语达人

Can I go, instead of getting my hair cut every seven weeks, can I go back to getting it done once a week -- or, I mean, once a month or once every three weeks?

WHITEHOUSE: Vice President Biden on Congressman Barton��s Apology to BP

Like a lot of people I am partial to cheese, often more than once a month, but also like most people I'm never going to join a club to celebrate my affection for it.

BBC: Jumble sale for internet dreams

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