common chicory vs prince's feather

common chicory

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

prince's feather

noun
  • Amaranthus hypochondriacus, an ornamental plant. 

How often have the words common chicory and prince's feather occurred in a corpus of books? (source: Google Ngram Viewer )