polychromatic vs showy

polychromatic

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

  • Composed of more than one wavelength. 

showy

adj
  • Making a striking or aesthetically pleasing display. 

  • Calling attention; flashy; standing out to the eye 

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