smouldering vs stirring

smouldering

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

adj
  • Burning slowly, producing smoke but no flame. 

stirring

noun
  • An occasion on which something stirs or is stirred 

adj
  • invigorating or inspiring 

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