chicory vs mare's-tail

chicory

noun
  • The endive (Cichorium endivia), the source of escarole and frisée. 

  • Either of two plants of the Asteraceae family. 

  • The common chicory (Cichorium intybus), the source of Belgian endive, radicchio, and sugarloaf. 

  • A coffee substitute made from the roasted roots of the common chicory, sometimes used as a cheap adulterant in real coffee. 

mare's-tail

noun
  • Equisetum, a fern ally 

  • especially, common mare's tail (Hippuris vulgaris) 

  • Erigeron canadensis (syn. Conyza canadensis), an annual weed 

  • A long streaky cloud, spreading out like a horse's tail, and believed to indicate rain; a cirrus cloud. 

  • Any aquatic plant of the genus Hippuris, having narrow leaves in whorls. 

How often have the words chicory and mare's-tail occurred in a corpus of books? (source: Google Ngram Viewer )