assfuck vs dirty business

assfuck

noun
  • Sodomy, anal sex, an act of anal intercourse. 

  • A jerk; an obnoxious person. 

  • An act of stunning betrayal. 

verb
  • To betray. 

  • To engage in anal intercourse. 

dirty business

noun
  • anal sex 

  • the practice of unethical methods 

How often have the words assfuck and dirty business occurred in a corpus of books? (source: Google Ngram Viewer )