dyed vs iridescent

dyed

adj
  • Coloured or tinted with dye, or as though therewith. 

iridescent

adj
  • Producing a display of lustrous, rainbow-like colors; prismatic. 

  • Brilliant, lustrous, or colorful. 

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