motherfucker vs sex partner

motherfucker

noun
  • One who engages in sex with a mother, not necessarily one's own. 

  • An extremely contemptible or mean person. 

  • An extremely intense experience, often but not always negative. 

  • To an extreme degree. 

  • A good very close friend or relative. 

  • One who engages in incest with their mother. 

  • Any person, often but not always with the connotation that the person is disliked or is threatening. 

intj
  • Expressing dismay, discontent, or surprise. 

sex partner

noun
  • Someone that one has sex with, especially on an informal or casual basis. 

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