Currently there is no way to see the total number of pages in those special pages (and the such) except for clicking "show the next 100" ad nausea. This is frustrating and demoralizing in clean-up campaigns. Pages should be automatically counted and the number shown somewhere. If the process can be considered too "expensive" on the server side, it can be limited so that it shows something like "more than X pages" once the X-limit is reached.
Link for the EnWiki discussion
This task mentions those 2 special pages because that's what we're currently dealing with but the same logic could be extended to other similar special pages if they exist.