cervix vs nape of the neck

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. 

nape of the neck

noun

  • The nape, back of the neck. 

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