Which is the correct sentence:

  • He goes to museum twice a week
  • He goes to museum twice in a week
  • Not many of the 'go to' expressions are used without the definite article; 'go to school' / 'work' / 'hospital' (BrE), when used in the non-geographical senses, are some. As is 'go to bed'. Nov 27, 2015 at 14:18

2 Answers 2

  1. He goes to the museum twice a week.
  2. He goes to the museum twice in a week.

The first implies that he goes twice every week. The second states that in one given week, he went twice.

  • Yes; it would be unusual to meet the second example in the present tense (without padding: 'For years, he never shows an interest in culture, and then he goes to the museum twice in a week!') Nov 27, 2015 at 14:16
  • Thanks Edwin and KillingTime. It really cleared out all doubts. It makes sense. :) Nov 27, 2015 at 14:22
  • 1
    'He goes to the museum' and 'He went to the museum' are different, as your last sentence shows. Nov 30, 2015 at 12:24

The correct form is, "He goes to the museum twice a week." (Note the word "museum" requires an article before it in your example.) It answers the implied question, "How often does he go to the museum?" Answer: "Twice a week."

There is nothing inherently wrong with "twice in." For example, if you were emphasizing the frequency of his trips, you might say, "He went to the museum twice in one day." In that case, you are choosing to emphasize the frequency as unusual. If you were simply stating a fact, you would say, "He went to the museum twice a day." That is, he made it a regular (ordinary) habit of visiting the museum twice a day.

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