The initial release which covered chapter 1, chapter 2 spanned a couple of updates, chapter 3 was 4, and so far Chapter 4 is up to 2. All-in-all, there's been 8 total updates if you don't include the very first release. I would say we're more than halfway finished, but as you can see, chapters have gotten bigger as time as went on.
As of Ch4Up2, there has been 18,911 images, 452 animations, and a total of 466,330 words. I estimate only 50% of the text is chups, so maybe just half that last number.