conflagration vs smouldering

conflagration

noun
  • A large fire extending to many objects, or over a large space; a general burning. 

  • A large-scale conflict. 

smouldering

noun
  • The act by which something smoulders; residual heat. 

adj
  • Burning slowly, producing smoke but no flame. 

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