Quote 37
There's hours and hours, hundreds of them. (2.127)
A day just has twenty-four hours, and Jack is probably only awake for sixteen of them, tops. But when he's bored, without Ma, the hours seem like they're stretched out forever and ever.
Quote 38
Stopped, the truck's stopped again, I'm not out already, I was meant to jump at the first. (3.735)
Jack already has a very poor concept of time. Add panic to the mix, and he completely loses all sense of it. He has no idea how long he's in the truck; all he knows is that it's been too long, and he fears that it's too late to attempt an escape.
Quote 39
At 06:12 Noreen brings another whole different tray that's dinner, we can have dinner at five something or six something or even seven something, Ma says. (4.511)
In Room, Jack was always aware of the time, but it seems that he's even more aware of it in the Outside. He's starting to realize that time is merely a suggestion, not a hard and fast rule to abide by when setting things such as mealtimes.