behead vs scruff

behead

verb
  • To deliberately remove the head of; to cut off (someone's) head. 

scruff

verb
  • To lift or carry by the scruff. 

noun
  • The back of the neck, nape; also scruff of the neck. 

  • Someone with an untidy appearance. 

  • The loose skin at the back of the neck of some animals. 

  • Stubble, facial hair (on males). 

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