How can I create a widget that shows requests closed within a certain timeframe

How can I create a widget that shows requests closed within a certain timeframe

Week-over-week, we report on a couple of metrics from the week prior

Number of requests Opened for a support group.
Number of requests Closed for a support group.

We've been able to produce those numbers, but what I can't seem to figure out is how to produce
Number of tickets created that were closed in less than 24 hours (Completed requests closed < 24 HOURS)

Any help would be appreciated.

Thanks,
Adam

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