blueberry vs cornflower

blueberry

adj
  • Of a dark blue colour. 

noun
  • The shrub of the above-mentioned berry. 

  • A dark blue colour. 

  • An edible round berry, belonging to the cowberry group (Vaccinium sect. Cyanococcus), with flared crowns at the end, that turns blue on ripening. 

verb
  • To gather or forage for blueberries. 

cornflower

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

noun
  • Cornflower blue. 

  • A plant of the species Cichorium intybus. 

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

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