nuchal vs withers

nuchal

noun
  • A neck scale, especially of a lizard. 

  • The back of the neck. 

adj
  • Of or pertaining to the back or nape of the neck. 

withers

noun
  • The part of the back of a four-legged animal that is between the shoulder blades; in many species the highest point of the body and the standard place to measure the animal's height. 

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