homicide vs kingslayer

homicide

noun
  • A person who kills another. 

  • The department within a police force that investigates cases of homicide. 

  • The killing of one person by another, whether premeditated or unintentional. 

  • A victim of homicide; a person who has been unlawfully killed by someone else. 

kingslayer

noun
  • One who kills a king. 

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