Call after half hour/ half an hour?

Hi,

Some people say "Call after half hour" and some "Call after half an hour". Which one is correct, please.

Sweetie

The second is the standard form, but colloquially the article is sometimes dropped.

Quote:

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Originally Posted by tdol

The second is the standard form, but colloquially the article is sometimes dropped.

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Hi,

Thanks for the help.

Regards,

Sweetie.