There was no set organisation with these, Just glancing at the ole osprey I see for example the region of Styria provided 13 battalions ie. 5 in the Graz district, 2 in Brucker,2 in Judenburg, 2 in Marburg and 2 in the Cilli district. By the time of Wagram several Landwher battalions were present, not to mention Vienna volunteers. Battalion strength varied greatly, from a few hundred to a thousand. Great to have these figures available to scatter among the white coated Hapsburg hordes don't you think?