dog's breakfast vs perfect storm

dog's breakfast

noun
  • An unappealing mixture; a disorderly situation; a mess. 

  • Used other than figuratively or idiomatically: see dog, breakfast. 

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. 

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