first-degree murder vs slasher

first-degree murder

noun
  • An act that constitutes the crime of first-degree murder. 

  • The criminal offence of murder in a form considered by law to be the most serious; the precise distinction may vary by jurisdiction but typically involves premeditation, or the choice of victim or other circumstances being regarded as especially blameworthy. 

slasher

noun
  • A murderer in such a film. 

  • A tool for cutting undergrowth. 

  • One who slashes. 

  • A horror movie with graphic blood and violence; a slasher movie. 

  • A machine for applying size to warp yarns. 

  • One who self-injures by cutting. 

  • One who writes slash fiction and/or supports male/male ships. 

How often have the words first-degree murder and slasher occurred in a corpus of books? (source: Google Ngram Viewer )