incandescent vs smouldering

incandescent

adj
  • Emitting light as a result of being heated. 

  • Showing intense emotion, as of a performance, etc. 

  • Shining very brightly. 

noun
  • An incandescent lamp or bulb 

smouldering

adj
  • Burning slowly, producing smoke but no flame. 

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

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