send to the scaffold vs string up

send to the scaffold

verb
  • To cause someone to be condemned to be hanged. 

  • To sentence to be hanged. 

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 send to the scaffold and string up occurred in a corpus of books? (source: Google Ngram Viewer )