Travel book, handle?

Moin Moin! I would like to know how the possibility of placing a travel book is handled in practice. Since I know pretty much nothing so far, I am interested in pretty much everything from beginning to end. So when is it imposed by the authorities to keep a travel book? Or otherwise: How many and/or how violent violations without finding out the driver takes in practice until this measure is taken? When it comes to this, it is quite clear to me that each individual How, however, is this checked in practice and what blooms if the entries are not exactly correct? Or how exactly do the tangled journeys have to be listed? Tenth-kilometres? Purpose? Start and finish address? Times minute exactly? Which tolerances are given in practice? And: If the driving book is imposed because with always the same of several vehicles of the same holder traffic violations are committed, in which the driver cannot find I know this is quite a lot of questions, but it would be nice if someone could tell me from the practice. Dear Greetings Meehster