groundnut vs maroon

groundnut

noun
  • A climbing vine, Apios americana, of eastern North America, having fragrant brownish flowers and small edible tubers. 

  • The nutlike tuber of such a plant, especially peanuts. 

  • A plant which bears its nutlike seeds underground, such as a peanut (Arachis hypogaea) or a Bambara groundnut (Vigna subterranea). 

  • Any similar plant having underground tubers. 

maroon

noun
  • A rich dark red, somewhat brownish, color. 

  • A rocket-propelled firework or skyrocket, often one used as a signal (e.g. to summon the crew of a lifeboat or warn of an air raid). 

  • A castaway; a person who has been marooned. 

  • An idiot; a fool. 

  • An escaped negro of the Caribbean and the Americas or a descendant of such a person. 

adj
  • Of a maroon color 

  • Associated with Maroon culture, communities or peoples. 

verb
  • To abandon in a remote, desolate place, as on a desert island. 

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