chopping vs quelling

chopping

noun
  • The action by which something is chopped. 

adj
  • Shifting or changing suddenly, as the wind; also, having tumbling waves dashing against each other. 

quelling

noun
  • The act by which something is quelled. 

adj
  • causing something to quell or be quelled 

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