draw blood vs injure

draw blood

verb
  • To have an injurious effect; to strike home, as a barb or insult. 

  • To wound one's opponent in such a way that they bleed. 

injure

verb
  • To damage or impair. 

  • To wound or cause physical harm to a living creature. 

  • To do injustice to. 

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