garrotte vs string up

garrotte

verb
  • To execute by strangulation. 

  • To suddenly render insensible by semi-strangulation, and then to rob. 

noun
  • A cord, wire or similar used for strangulation. 

  • An iron collar formerly used in Spain to execute people by strangulation. 

string up

verb
  • To kill (a person) by hanging, especially to lynch. 

  • To concatenate; to link in a line. 

  • To suspend by means of rope, cord or similar material. 

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