perfect storm vs shambles

perfect storm

noun
  • A situation whereby several problems come together and make everything worse. 

  • A powerful hurricane or other major weather disturbance, especially as produced by a combination of meteorological conditions. 

shambles

noun
  • A scene of great disorder or ruin. 

  • A great mess or clutter. 

  • A scene of bloodshed, carnage or devastation. 

  • A slaughterhouse. 

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