Mahoushoujo wa Otona no Tsutome Desu is a Japanese novel of 75,825 characters, with 4,926 unique words and 1,334 different kanji. Its difficulty rating on Jiten is hard, 3.3 out of 5. The full vocabulary list ranks all 4,926 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.