colorful vs lilac

colorful

adj
  • Possessing prominent and varied colors. 

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

  • Interesting, multifaceted, energetic, distinctive. 

lilac

adj
  • Having a pale purple colour. 

noun
  • A flower of the lilac shrub. 

  • A pale purple color, the color of some lilac flowers. 

  • A large shrub of the genus Syringa, especially Syringa vulgaris, bearing white, pale-pink, or purple flowers. 

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