I just spent 5min looking for usage of the word "heaviosity", which appealingly sounds and seems likes a real word, but in fact doesn't seem to be one. Perhaps the author used a seemingly deep, but incorrect, word as a way to poke fun at literary critics. Perhaps the word doesn't exist and the author just made a mistake. Or, perhaps the word is used by certain groups of of people, but it hasn't shown up on the web.