polychromatic vs unvaried

polychromatic

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

  • Composed of more than one wavelength. 

unvaried

adj
  • not varied; monotonous or homogeneous; samely 

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