etiquette vs praxis

etiquette

noun
  • The forms required by a good upbringing, or prescribed by authority, to be observed in social or official life; observance of the proprieties of rank and occasion; conventional decorum; ceremonial code of polite society. 

  • The customary behavior of members of a profession, business, law, or sports team towards each other. 

  • A label used to indicate that a letter is to be sent by airmail. 

  • 2012, July 15. Richard Williams in Guardian Unlimited, Tour de France 2012: Carpet tacks cannot force Bradley Wiggins off track 

praxis

noun
  • Custom or established practice. 

  • The synthesis of theory and practice, without presuming the primacy of either. 

  • The deliberate action of a rational being. 

  • An example or form of exercise, or a collection of such examples, for practice. 

  • The practical application of any branch of learning. 

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