nape vs upper arm

nape

noun

  • The back part of the neck. 

  • Napalm. 

  • The part of a fish or bird immediately behind the head. 

verb

  • To bombard with napalm. 

upper arm

noun

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

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