draw back vs quail

draw back

verb
  • to retreat from a position 

  • to pull something back or apart 

  • to withdraw from an undertaking 

  • to move backwards 

quail

verb
  • To waste away; to fade, to wither. 

  • Of courage, faith, etc.: to slacken, to give way. 

  • To lose heart or courage; to be daunted or fearful. 

noun
  • The meat from this bird eaten as food. 

  • Any of various small game birds of the genera Coturnix, Anurophasis or Perdicula in the Old World family Phasianidae or of the New World family Odontophoridae. 

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