heather vs wood pigeon

heather

noun
  • Various species of the genus Cassiope. 

  • A plant in the family Ericaceae. 

  • Various species of the genus Erica. 

  • A purple colour with a tint of pink and blue. 

  • An evergreen plant, Calluna vulgaris, with spiky leaves and small purple, pink, or white flowers. 

  • The use of interwoven yarns of mixed colours to produce flecks. 

adj
  • Of a purple colour with a tint of pink and blue. 

wood pigeon

noun
  • Any of several related species of pigeon in the genus Columba. 

  • The common wood pigeon, an Old World species of pigeon, Columba palumbus. 

  • A very large (up to 650 grams) species of pigeon native to New Zealand, Hemiphaga novaeseelandiae. 

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