nape of the neck vs slummock

nape of the neck

noun

  • The nape, back of the neck. 

slummock

noun

  • A slovenly person 

verb

  • To behave awkwardly or clumsily 

  • To behave lazily or indolently 

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