derangement vs sex abuse

derangement

noun
  • An act or instance of deranging. 

  • A permutation of a set such that no element is in its previous position. 

  • The property of being deranged. 

sex abuse

noun
  • Synonym of sexual abuse. 

How often have the words derangement and sex abuse occurred in a corpus of books? (source: Google Ngram Viewer )