coloration vs luminosity

coloration

noun
  • The act or art of coloring. 

  • Ornamental division (also called passaggi, glosas, diminutions. etc.) employing rapid black notes. 

  • A notational device for indicating hemiola through either use of red ink (in mensural black notation) or black noteheads (in mensural white notation). 

  • The quality of being colored. 

  • Political tendency. 

luminosity

noun
  • the state of being luminous, or a luminous object; brilliance or radiance 

  • the rate at which a star radiates energy in all directions 

  • the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor 

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