braise vs fire up

braise

verb
  • To cook in a small amount of liquid, in a covered pan, somewhere between steaming and boiling. 

noun
  • A sauce used for braising. 

  • A dish (usually meat) prepared by braising. 

  • Pagellus bogaraveo, syn. Pagellus centrodontus (sea bream) 

fire up

verb
  • To ignite. 

  • To excite; to infuse with energy. 

  • Of an engine or similar, to start. 

  • To launch; to run. 

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