Help with UI on Techstream

Hello,

I recently used the Techstream software (12.20.024) for the first time to run some diagnostics on my 2011 Prius. I have some question about the UI on the freeze frames. I cannot for the life of me find a manual for the Techstream software. Does anyone know if the columns labeled [-3, -2, -1, 0, 1] on the Freeze Frame Data are timestamps? Do they represent multiple 'snapshots' of the live data over a set period of time?

I am getting a P0A80 error code and am trying to look at the battery block voltages, but want to make sure I am interpreting the info correctly. I included a screenshot of what the top of my Freeze Frame window looks like with the columns in question highlighted.