coppery vs sorrel

coppery

adj
  • Containing copper, especially if abundantly. 

  • Resembling the metal copper, especially in color. 

sorrel

adj
  • Of a brown colour, with a tint of red. (especially: a sorrel horse) 

noun
  • Rumex acetosa (common sorrel, garden sorrel), sometimes used as a salad vegetable. 

  • The roselle, Hibiscus sabdariffa. 

  • A brown colour, with a tint of red. 

  • Members of genus Oxalis or family Oxalidaceae, woodsorrels. 

  • A drink, consumed especially in the Caribbean around Christmas, made from the flowers of Hibiscus sabdariffa: hibiscus tea. 

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