title: How to run tests in production using VSTS
body: <p>I am trying to run a batch of tests every x minutes using a Build Definition on visualstudio.com. The reason I want to do that is to monitor the service if it is still alive and well. 
  However I wasn't able to find a trigger for every x minutes. All what I was able to find is Continuous Integration trigger and Scheduled triggers. For Scheduled a time in day is passed. 
  Can I do testing in production this way? Do I need to use a different service/tool? 
  Do you know if TeamCity has such a trigger in their build definitions?</p>