RevealUptime can check your website or web service up to 24 times a minute, or about every 2.5 seconds.
When you select the 15 second option, every one of the testing servers will test every 15 seconds. So if you select 6 of our testing servers, at 15 seconds, we will test your website or service 24 times per minute, or about every 2.5 seconds. We do not use a round robin approach. This is by design to minimize false positives.
If you would like your tests to be done less frequently, just select the 60 second option and any number of testing server combinations.