Look at this American conversation

Isabel: Hi Vicky, this is Isabel. I'm the company's travel coordinator.
Vicky: Hi Isabel. Is there a problem?
Isabel: No. I see that you take quite a few business trips a month.
Vicky: Yes, I do.
Isabel: I noticed that you are not signed up for frequent flier miles.
Vicky: No, I haven't signed up yet.
Isabel: Please sign up before your next trip. You can earn miles and get a free trip anywhere in the country.
Vicky: I didn't know that.
Isabel: It's easy to sign up. You can do it online.
Vicky: I will do that today since I have another business trip at the end of the week.

What does "a month" mean in "I see that you take quite a few business trips a month."?

I know that American people often omit prepositions before Mondays, mornings.

Example "Do you work Saturdays?"="Do you work on Saturdays?"

I am not sure whether they omit "in" in "in a month".

  • 1
    In this case, "a month" means "per month", an observation that she's traveling often.
    – fixer1234
    Jul 29, 2017 at 3:45
  • That isn't an omission of the preposition before "Mondays, mornings". It is a relic of a genitive.
    – TimR
    Jul 29, 2017 at 9:38

1 Answer 1


What does "a month" mean in "I see that you take quite a few business trips a month."

In this case a month refers to the frequency of trips taken each month.

You can also say per month which means the same thing.

Also, if you use each month, a month or per month then I think that it is implied, but not stated, that a number of trips are made for several months in a year, or in succession.

I'm not sure that North Americans omit the preposition in

Living in Canada, I can only say that I have only heard: a month, per month (less common), and each month.

It's possible that we use in a month to describe a quota, as in the following sentence:

The factory has to produce fifty cars in a month to make a profit.

I hope that helps.

  • You mean "The factory has to produce fifty cars within a month to make a profit." ? Jul 29, 2017 at 5:29
  • Generally good answer, but I think the "in a month" explanation misses the mark. The quota you describe would be better stated as "per month". "A month", "per month" or "each month" refer to recurring past behavior, a monthly rate or frequency. "In a month" would more likely refer to a one-time current or upcoming requirement.
    – fixer1234
    Jul 29, 2017 at 5:37
  • I have long been under the impression that Canada is in North America; have you really never heard anyone say "Oh, I can't make it, I work Saturdays" or "I worked six months on that project"? Jul 29, 2017 at 5:57

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