The the X isn't anything naughty this time. Just a general number. We all have out moments of hesitation and I noticed this often happens at the specific breaking points, varying between individuals. After how many page or how long into the story do you have some sort of writing crisis? A block, a need to rewrite everything, a peak in feeling that what you written so far is crap, or whatever it might be. Me I have a 15 pages crisis. After 15 pages I want to redo something about what i written so far, maybw a change of POV, maybe a change in the setting, maybe starting the story at a different point.