As far as I know, MFiX has time-averaging for monitors but not for histograms. (And furthermore particle orientation is not available on the monitors menu… perhaps this should be added.) So you cannot do this directly in MFiX.
It’s possible you could do this in Paraview but I’m not sure.
If Paraview doesn’t do it, you’re going to have to write some code to extract data from the PVD files and do the time-averaging yourself. I suggest Python for this.
See for example Saving data as .csv files for some example code.