I called my doctor's office to get my medical records. Here's what I've got on file.

Date - Total T
6/19/2018 - 239.6ng/dL
7/11/2018 - 476.8ng/dL
11/5/2018 - 246.5ng/dL

They don't have free T recorded for some reason.
So it looks more like T has a large degree of variation - at least based on this sample.