burnable vs firebrand

burnable

noun
  • Anything that can be burned. 

adj
  • Able to be burned; combustible 

firebrand

noun
  • A torch or other burning stick with a flame at one end. 

  • An argumentative troublemaker or revolutionary; one who agitates against the status quo. 

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