What does "beat" mean in the phrase "crime beat"?

English as a Second Language English Vocabulary, Grammar and Idioms
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Crime Beat: For no reason — The Murders of Dianna and Richard | S2 E10 - YouTube
What does “beat” mean in the phrase “crime beat”?

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The area or route that a police officer normally patrols.
Similarly, the news sources and types of stories that a newspaper reporter normally covers.

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