colorful vs polychromatic

colorful

adj
  • Possessing prominent and varied colors. 

  • Profane, obscene, offensive (usually in the phrase colourful language). 

  • Interesting, multifaceted, energetic, distinctive. 

polychromatic

adj
  • Showing a variety, or a change, of colours; having many colours; multicoloured. 

  • Composed of more than one wavelength. 

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