To locate test cases that ran in the cloud, you can go to Reporting > Test Cases. This report will show you all test cases than ran in the cloud sorted by date (newest to oldest). You can use filtering on this report to narrow down your search to a more specific period of date/time by clicking on Add Filter + and selecting the necessary parameters as you can see below:
However, for test cases than you run locally on your machine, this is a feature request which is being developed to be released in the future.
To track down how frequently you run all test cases, you can use Reporting > Usage Metrics report which displays Manual vs Automated test cases in a period of time that you can adjust there. But for specific test cases, you can use the Test Cases report mentioned above as it offers more details with filtering where you can enter a name of a specific test case and enter your date/time to provide the needed results.