you can create your report in Settings > Searches, Reports, and Alerts > New Report. Once you set all the details of your report (i.e. report name, search, earliest and latest time, ...) you can save it and the click on Edit >Edit Schedule > check Enable. Here you can schedule your report at a fixed frequency. In the Schedule dropdown, select "Run on Cron Schedule" and then you can explicitly insert a cron expression. If you need you report to run every 10 minutes, you can type "*/10 * * * *" (this will execute the report every 10 minutes every day).