convention vs praxis

convention

noun
  • A practice or procedure widely observed in a group, especially to facilitate social interaction; a custom. 

  • A formal agreement, contract, rule, or pact. 

  • A treaty or supplement to such. 

  • A meeting or gathering. 

  • The convening of a formal meeting. 

  • A formal deliberative assembly of mandated delegates. 

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