deferment vs quelling

deferment

noun
  • An act or instance of deferring or putting off. 

  • Officially sanctioned postponement of compulsory military service. 

quelling

noun
  • The act by which something is quelled. 

adj
  • causing something to quell or be quelled 

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