AI-generated Key Takeaways
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          A frequency cap is a rule limiting how many times an ad (or set of ads) is shown to a user within a specific timeframe. 
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          Each frequency cap has a unique key of type FrequencyCapKey.
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          The capfield is an integer specifying the maximum number of events permitted within the defined time range.
A rule specifying the maximum number of times an ad (or some set of ads) can be shown to a user over a particular time period.
| Fields | |
|---|---|
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 | The key of a particular frequency cap. There can be no more than one frequency cap with the same key. | 
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 | 
 Maximum number of events allowed during the time range by this cap. |