The chastity/OD community doesn't really have a set syntax for some of the things that we do, so you get people (mainly guys) who try to over-think answers to questions like this.
The longest time I've spent in a device; i.e., without removing it for cleaning, adjusting, or anything else, was 4-1/2 months. It was a modded CB3000, which I still use, BTW, and the cuff ring broke while we were fooling around, or else I'd have been in much longer.
Until recently, the longest time I spent with no orgasm was 8-1/2 months. That was mostly wearing the device, with a few removals for checking, cleaning, and adjusting.
This time around is mainly OD because that just happens to be where we are in our life at the moment. I've had a few ruined orgasms to clear the pipes; she uses the "stifling" method, in which she clamps down hard at the last second, although recently we've been playing with just edging up to the "almost but not quite" point.