Haha! If only it were true. I think it was more like once every 2 months.
(I'm kidding of course, just in case anyone else is offended by my lame attempt at humor)
We can't really tell because our industry is so messed up wrt personal optimization and unhealthy work practices that showering once every two month sounds kinda probable.
Or sarcasm... Or mind your own business type of answer, you know?
Also, do you know showering too often destroy your skin bacteria and oil and that those exist for a reason?