I don't think it ever gets to '0', with meds.
I think that 1-2 is the best we can hope for, with occasional periods
of distraction that seem to be an '0', but in reality are just that we are
so absorbed in whatever else we are doing, that the time goes by,
& we don't realize that we've been 'pain free' for a short time.
We really aren't, but the mind seems to play many tricks with the
ability to block-out certain pain, if it is distracted enough.
Just an observation, and personal comment.