Sampling Interval Definition
 

Hi,

I just startet working with CFD and I'm currently trying to simulate the flow around a sphere. I used the tutorials and the user-guide to learn the basics, but i could not find answers for my question.
I want to sample the data of an unsteady simulation in order to see the mean statistics, but I'm not sure how to properly set the sampling interval for my case.
Could someone tell me the definition of the Sampling Interval and if there is a connection to the time step size?