Unfortunately I do not have one in German (cannot read German). Frederick would not have had over 100K in any one battle since he was fighting on several fronts at the same time. Much of the information I know regarding the occupation of Saxony comes from "The Seven Years War in Europe" by Franz Szabo. Mr. Szabo is certainly no fan of Frederick. In fact my only criticism of the book is that he is way too critical of Frederick to the point of the ridiculous (like insulting his flute playing abilities).
I should elaborate on my statement a little as when I re-read it I can see the misunderstanding. Frederick invaded with 100K and occupied Saxony for nearly 7 years, but he did not necessarily have 100K in Saxony for the whole seven years. Sorry for any misunderstanding.