There is a wonderful article on brumation on this site, you should read it through. It's by a member, Denise Bushnell, and is very well written.
We have 4 beardies and they all brumated in different ways last winter. Sweetie slept from Sept to Dec, hardly waking up and not losing any weight.
Lonzo slept every 2 days for 2 or 3 days Sept/Oct/Nov, then was up and about.
Rubio was only 1 yrs old, he slept a day here and there.
Leo wasn't with us yet, but he didn't do alot of sleeping at the previous owners.
So each beardie is different. The only thing to make sure is that they poop out all of their last meal, it's very important they have an empty stomach to sleep on, or food can rot and cause some nasty infections. Also that they have a hide or a blankie to hide under so your life can go on without disturbing them. There are alot of topics about brumation that you can search out.
good luck!
Deb