come to a stop vs weaken

come to a stop

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

  • To stop moving or being active; to stop. 

weaken

verb
  • To become weaker or less strong. 

  • To make weaker or less strong. 

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