cervix vs upper arm

cervix

noun
  • The neck 

  • The lower, narrow portion of the uterus where it joins with the top end of the vagina. 

  • The necklike portion of any part, as of the womb. 

upper arm

noun
  • The section of an arm from the elbow to the shoulder. 

How often have the words cervix and upper arm occurred in a corpus of books? (source: Google Ngram Viewer )