axiological vs constitutive

axiological

adj
  • Of or relating to values themselves. 

  • Of or relating to value theory, the philosophical field of axiology. 

constitutive

adj
  • having the power or authority to constitute, establish or enact something 

  • extremely important, essential 

  • having the power or authority to appoint someone to office 

  • that forms a constituent part of something else 

  • (of an enzyme) that is continuously produced at a constant rate 

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