cremation vs smouldering

cremation

noun
  • A burning; especially the act or practice of cremating the dead, burning a corpse. 

smouldering

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

adj
  • Burning slowly, producing smoke but no flame. 

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