garrote vs garrotte

garrote

noun
  • an iron collar formerly used in Spain to execute people by strangulation 

  • something, especially a cord or wire, used for strangulation 

verb
  • to execute by strangulation 

  • to kill using a garrote 

garrotte

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

  • A cord, wire or similar used for strangulation. 

verb
  • To execute by strangulation. 

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

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