Practice is accumulative, don't sit there for 2 hours straight. Break it up, I might get 30-40 min in in the morning ( 4 AM) before work. 30 minutes in in the afternoon after work ( maybe 3:30ish) And some time in after dark. These days I'm not doing two hours a day though. I just got out of work, I'm glancing through here at 3:03 relaxing briefly. Then I'm going on a bike ride for about an hour. When I get back, Quick shower and a piano lesson to give ( 5PM), then supper time. After supper around 6:30 I'll practice for half an hour and again tomorrow morning before work.
The last few weeks have been bundled with yard work and yard machine services etc. I was getting in 20 minute shots at the piano. On the weekends I do more, I'm an early riser, my wife later riser. One could find me at the piano at 3:30 am on the weekend for the couple of hours you mention. Or just as well it may be 5 Am.