common chicory vs indigo bunting

common chicory

noun
  • Cichorium intybus, a somewhat woody perennial herbaceous plant of the dandelion family, many varieties of which are cultivated for salad leaves. 

indigo bunting

noun
  • A blue bunting of North America, Passerina cyanea. 

How often have the words common chicory and indigo bunting occurred in a corpus of books? (source: Google Ngram Viewer )