deferment vs quiescency

deferment

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

  • Officially sanctioned postponement of compulsory military service. 

quiescency

noun
  • Quiescence: the state of being quiescent, or at rest 

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