title: Service invoked too many times for one day: tricreate
body: <p>I am making an app as part of Google summer of code, the app is running but I wanted to add an additional feature, this feature needs to create a number of spreadsheets and fill them with data, however somewhere in the middle I get an error:"Service invoked too many times for one day: tricreate. (line 19)". I understood that some services have limits and that is probably the reason, but I need help to understand how the limits "work" for spreadsheets in order to find a way to work around them, I guess it is time based, but is it on daily basis, hours, minutes?</p>
  
  <p>Any help would be much appreciated...</p>