braai vs charbroil

braai

verb
  • To grill meat over an open flame (not on a gass grill). 

noun
  • A social meeting, including the braaing of meat; a cookout. 

  • A barbecue (grill), especially an open outdoor grill built specifically for the purpose of braaing. 

charbroil

verb
  • To cook on a flat, lined metal surface that is heated from below; to chargrill. 

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