Creo Simulate > Reference Links > Time/Frequency Eval
  
Time/Frequency Eval
Activate the optional Dynamic Evaluation menu, which you use to select a time or frequency evaluation method.
If you select the Time/Frequency Eval check box, Creo Simulate calculates the measure for dynamic time and dynamic frequency analyses. Creo Simulate also calculates the measure for dynamic random analyses provided you base the measure on a directional component and take the measure at a point. Note that if you select Failure Index as the quantity, Creo Simulate calculates the measure for dynamic time analyses only.
For most quantities, if you do not select Time/Frequency Eval, Creo Simulate calculates the measure for dynamic shock, static, prestress static, and contact analyses.