It occurs multiple times per hour. I would say 2-3 time per hour. I only recognise it when I'm doing things like raiding where there's a lot of input on the controller. It usually begins to re-manifest itself a few weeks after installation. This past time, I was extremely sure to update everything on the PC from the beginning after the installation.

All of the controllers are wired and I do not use anything other than the generic drivers that windows installs.

I'm not sure it matters but this past time I did notice it SEEMED to start after installing a program I needed for work that required a .net update. Let me say this tho. The controller(s) work absolutely fine on other games with FFXIV being the oddball out.