pull back vs quiver

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. 

quiver

verb
  • To shake or move with slight and tremulous motion. 

noun
  • A multidigraph. 

  • A ready storage location for figurative tools or weapons. 

  • A container for arrows, crossbow bolts or darts, such as those fired from a bow, crossbow or blowgun. 

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