come to a stop vs quieten down

come to a stop

verb
  • To stop moving or being active; to stop. 

  • To reach a point where little progress is being made; to come to an impasse; to stop. 

quieten down

verb
  • To reduce intensity of an activity. 

  • To make someone or something become quieter. 

  • To become quieter. 

How often have the words come to a stop and quieten down occurred in a corpus of books? (source: Google Ngram Viewer )