lilac vs mottle

lilac

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

  • A flower of the lilac shrub. 

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

adj
  • Having a pale purple colour. 

mottle

noun
  • A mottled coloration or pattern. 

  • A distinguishing blotch of color. 

verb
  • To mark with blotches of different color, or shades of color, as if stained; to spot; to maculate. 

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