heath vs lilac

heath

noun
  • Any small evergreen shrub of the family Ericaceae. 

  • Many of the species in the genus Cassiope 

  • A tract of level uncultivated land with sandy soil and scrubby vegetation; heathland. 

  • Both species in the genus Daboecia 

  • Any of the species in the genus Leucopogon, beard heath 

  • Coenonympha pamphilus, native to Europe, Asia except tropical India and Indochina, and Northern Africa, the small heath 

  • Many of the species in the genus Erica 

  • Coenonympha tullia, native to Europe, Asia except tropical India and Indochina, and North America, the large heath 

  • Any of the species in the genus Epacris, Australian heath 

  • Any of the species in the genus Phyllodoce, mountain heath 

  • Semiothisa clathrata, a moth known as the latticed heath 

  • Melitaea athalia, the heath fritillary 

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. 

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