come to a stop vs taper off

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. 

taper off

verb
  • To diminish or lessen gradually; to become smaller, slower, quieter, etc. 

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