cold as a mackerel vs shivering

cold as a mackerel

adj
  • Very cold (in temperature, emotionally, etc.). 

  • Completely unconscious. 

shivering

noun
  • The action of a person or thing that shivers; a trembling. 

How often have the words cold as a mackerel and shivering occurred in a corpus of books? (source: Google Ngram Viewer )