[Tuga]

Thank you all for your answers, they where really helpful.

But actually, what I was wondering was more if the process was gradual or if it happened one day.
Like: I ask her to seat when I give her food, I don't want her to jump around. For some weeks she just ignored me. One day I said "seat", like I always did, and she sat. Now she does it all the time, I don't even have to ask her anymore. It was sudden, one day she just understood what I wanted...

Babies (human babies) pee all the time in their diapers. Then they start to do it less and less often as they learn to control their bladder. One day you can just let go of diapers. It's kind of a sudden thing. My son only had a couple of "accidents" when I took the diapers away, he was ready.
I was wondering if it was like that with dogs...
If one day they could control themselves and wait enough time to go outside (or to the pad) or if they started peeing less and less times around until they turned completely clean?
I mean, is it sudden or a progressive process?