pull back vs stand firm

pull back

verb
  • Used other than figuratively or idiomatically: see pull, back. 

  • To retreat. 

  • To pass (the ball) into a position further from the attacking goal line. 

  • To score when the team is losing. 

stand firm

verb
  • To resist assault or pressure. 

How often have the words pull back and stand firm occurred in a corpus of books? (source: Google Ngram Viewer )