Me: I’d like to pick over this battlefield to replenish my arrows.
GM: Yeah, yeah, you get your arrows back.
Me: Ah, Can I log it as practice time for scavenging?
GM: It only took, like, ten minutes.
Me: Ten minutes of practice time logged!
GM: Are you serious?
Me, looking straight into your eyes from across time: Absolutely.
I’m of the mind that every little bit adds up. Some groups, I think, have less crazy (AND LESS FUN!) ideas. Regardless of the rules, I think the bigger question is procedure. A particularly grubby, greedy (canny!) player can drag things down by trying to cram minutes of practice in at every quiet moment at the table. More passive procedures (Like, the GM handing out practice in the rare moments when they remember it exists) can make the rules dry and anemic. My advice is to stick to description first. Describe your character doing things, then, if no test is called for, think about practice – That’s basically my procedure as a player: I describe my character doing stuff (and why), and when I expect to have to (or get to) make a test but the GM Says Yes, I confirm the time it took and say that I wanna log it as practice. I don’t think I’ve pissed people off too much doing that. When there are long passages of time – days, months, years – then I pull practice more to the front of my attention.
But always, always, you gotta describe your character doing something to log practice, even if it’s just dedicated training. (And it’s gotta make sense; you’re not practicing Read in an Oubliette.)
I dunno. My best research turned out a puzzled Luke suggesting it might have been in there for Training skills. Best I can tell, that’s incorrect, in the current version of the game at least. Training skills have a category to them, like Martial or Military, so it seems like you would use the times for those categories.
I reckon it’s an error. I haven’t had any trouble ignoring them. But you might have to wait for Luke to chime in if you want a better answer. Or, if you want the best answer… For Thor to. (THAT’S RIGHT! I SAID IT! 
)