Saving the game once advances the PID frame by 1. Walking around 17 steps advances the PID frame by 1. Walking 128 steps with X amount of Pokémon in your party advances the IV frame by X.Ah, I see. I misunderstood :P Thanks for clearing that up!
So, how fast is it to advance your frame this gen? I have problems keeping track of big numbers, so I hope that's not a problem.
Not very fast. This is why ID/SID abuse is discussed, so you don't have to do too many advancements to get a shiny PID on your non-C-Gear seed. But just because you didn't abuse an ID/SID doesn't mean you can't get flawless shinies. It just takes longer. A lot longer. And abusing an ID/SID is ridiculously easy from what I've heard.