cool down vs inhibit

cool down

verb
  • To become less agitated or excited. 

  • To become cooler; to be reduced in temperature. 

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

  • To decrease in degree or intensity. 

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

inhibit

verb
  • To hold in or hold back; to keep in check; restrain. 

  • To recuse. 

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