hangi vs roaster

hangi

noun
  • Food cooked in this way. 

  • A traditional Māori method of cooking food using heated rocks buried in a pit oven. 

roaster

noun
  • One who roasts food. 

  • A hot Jupiter. 

  • A kitchen utensil used for roasting. 

  • An objectionable person; somebody making a fool of themselves. 

  • A chicken, pig, etc. suitable for roasting. 

  • One who roasts or banters, especially as a comedy routine. 

  • A furnace used in making ball soda. 

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