formality vs praxis

formality

noun
  • Something said or done as a matter of form. 

  • A specific requirement for obtaining a legal status, conducting a transaction, etc. 

  • A customary ritual without new or unique meaning. 

  • The state of being formal. 

praxis

noun
  • The deliberate action of a rational being. 

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

  • Custom or established practice. 

  • 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 formality and praxis occurred in a corpus of books? (source: Google Ngram Viewer )