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MustAsk Posted 13 years ago
Grammar

Half-hour intervals

Hi

Is there a difference in meaning

The trains run at half-hour intervals

The trains run at half-hourly intervals

Thanks
  

Top answer

The first is the native form, that is all.

— Mister Micawber

  • The first is the native form, that is all.
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2 Answers
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The first is the native form, that is all.
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Both are fine in British English.
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