lilac vs lilac-colored

lilac

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. 

adj
  • Having a pale purple colour. 

lilac-colored

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