pounding vs smouldering

pounding

noun
  • An act in which something or someone is pounded. 

adj
  • Characterized by heavy or loud throbs 

smouldering

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

adj
  • Burning slowly, producing smoke but no flame. 

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