mass murder vs shambles

mass murder

noun
  • The killing of a large number of people over a short period of time. 

shambles

noun
  • A scene of bloodshed, carnage or devastation. 

  • A great mess or clutter. 

  • A scene of great disorder or ruin. 

  • A slaughterhouse. 

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