Depends on how big your plants are! A couple of huge plants might indeed take 10 hours if there were a lot of small buds to do in particular.
Each bud will have about 30-50 bud leaves, all which should be snipped off as close to completely as possible.
This is
TEDIOUS, TIME CONSUMING AND MY VERY MOST HATED PART OF THE JOB!
I usually find some way to distract myself with some interesting podcasts from
NPR or
Radio National. Great way to pass hours and hours while doing the otherwise
mind numbing manicuring work.
The SoG style stalks of buds I grow have less leaf for the amount of bud because I don't grow the bottom 2/3 of the natural plant. Smaller buds are more time consuming to manicure.
Each one of these SoG plants takes about 40-50mins to trim.