resignation vs restraint

resignation

noun
  • An uncomplaining acceptance of something undesirable but unavoidable. 

  • A written or oral declaration that one resigns. 

  • The form by which a vassal returns the feu into the hands of a superior. 

  • The act of resigning. 

restraint

noun
  • something that restrains, ties, fastens or secures 

  • control or caution; reserve 

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