cornflower vs whortleberry

cornflower

noun
  • A plant of the species Cichorium intybus. 

  • Cornflower blue. 

  • A small annual plant in the family Asteraceae, Centaurea cyanus, usually with bushy blue flowers which grows natively in European cornfields (i.e. wheatfields). 

adj
  • Of a blue colour, as that of the cornflower; cornflower blue. 

whortleberry

noun
  • A berry of one of these shrubs. 

  • Vaccinium vitis-idaea (lingonberry or red whortleberry); 

  • Vaccinium myrtillus (bilberry or blue whortleberry); 

  • Vaccinium uliginosum (bog whortleberry or bilberry). 

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