parricide vs uxoricide

parricide

noun
  • Someone who kills a relative, especially a parent. 

  • The killing of a relative, especially a parent. 

  • The killing of a ruler, or other authority figure; treason. 

  • Someone who commits treason. 

uxoricide

noun
  • One who murders his or her wife. 

  • The murdering of one's own wife. 

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