kill by hanging vs scrag

kill by hanging

verb
  • to kill someone by suspending them by the neck 

scrag

verb
  • To destroy or kill. 

  • To harass; to manhandle. 

noun
  • A rough or unkempt woman. 

  • A ragged, stunted tree or branch. 

  • A scrog. 

  • A chav or ned; a stereotypically loud and aggressive person of lower social class. 

How often have the words kill by hanging and scrag occurred in a corpus of books? (source: Google Ngram Viewer )