cook over an open pit vs rotisserie

cook over an open pit

rotisserie

verb
  • To cook on a rotisserie. 

noun
  • A cooking device with which food is roasted on a rotating spit. 

  • A shop or restaurant selling food cooked in this manner. 

How often have the words cook over an open pit and rotisserie occurred in a corpus of books? (source: Google Ngram Viewer )