cool down vs hog-tie

cool down

verb
  • To cause (someone) to become less agitated or excited. 

  • To become cooler; to be reduced in temperature. 

  • To become less agitated or excited. 

  • To cause (something) to become cooler; to reduce the temperature of. 

  • To decrease in degree or intensity. 

hog-tie

verb
  • To render helpless. 

  • To tie a person's or animal's feet together; originally all four legs of a quadruped. 

noun
  • The act of tying the feet together in this way. 

How often have the words cool down and hog-tie occurred in a corpus of books? (source: Google Ngram Viewer )