In a previous post, I described how non-dictionary word use in Amazon reviews peak in a periodic way in Mercury retrograde.

I redid the analysis but also took out the common words "dvds", "DVDs", "apps", and "Apps" from consideration. (They would have been counted as misspellings before which I did not first realize.)

I also applied the mean filter to a wider time frame, so that it would be more accurate in the window of July 1, 2009 to Jul 1, 2013:

Non-dictionary word rate in Amazon reviews from July 2009 to July 2013, actual values in blue against the general trend in gold, with Mercury retrograde periods shaded

That was enough to reduce the peak at 9. (Perhaps, there was some kind of DVD and/or app release cycle that the 9 band referred to.)

The result is that the fundamental in the transform is now at 13. 

Fourier transform of the non-dictionary word rate series, plotted across roughly 1,450 frequency bands

That gives us the following for the fundamental wave:

The fundamental wave plotted against Mercury retrograde periods, demarcated by gray bands

The peaks of this wave align very well with Mercury retrograde (demarcated by the gray bands), representing a regular increase of 613.789 percent from the average difference of blue actual value from gold general trend in the top picture during those times