ghoul vs succuba

ghoul

noun
  • A demon said to feed on corpses. 

  • A person with a callous or uncaring attitude to human life and suffering, particularly when prioritising economic concerns. 

  • A person with an undue interest in death and corpses, or more generally in things that are revolting and repulsive. 

  • A graverobber. 

succuba

noun
  • A female demon or fiend; a succubus. 

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