asphyxiate vs garrote

asphyxiate

verb
  • To smother or suffocate someone. 

  • To be smothered or suffocated. 

garrote

verb
  • to kill using a garrote 

  • to execute by strangulation 

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

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

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