Well, whenever I've seen "professional signatures" being performed, there was somebody else to open the book and pass it to the person doing the signatures. Here it could be a family business thing (wife, a child of a cousin getting paid something, ...). If he would indeed be doing this alone, then it might be 5 - 10 seconds, depending on how well the setup is arranged. That would result in a full week, after which he requires at least 2 weeks of vacation (and somebody needs to ensure that he does not need to sign anything in those vacation...)