hamstring vs render powerless

hamstring

verb
  • To lame or disable by cutting the tendons of the ham or knee; to hough. 

  • To cripple; to incapacitate; to disable. 

noun
  • One of the great tendons situated in each side of the ham, or space back of the knee, and connected with the muscles of the back of the thigh. 

  • The biceps femoris, semimembranosus, and semitendinosus muscles. 

render powerless

How often have the words hamstring and render powerless occurred in a corpus of books? (source: Google Ngram Viewer )