haricot vs string bean

haricot

noun

  • A common bean. 

  • A stew of lamb and vegetables. 

string bean

noun

  • A common bean (Phaseolus vulgaris) 

  • A hyacinth bean (Lablab purpureus) 

  • Any long, slender green bean. 

  • A tall and thin person. 

  • An immature runner bean (Phaseolus coccineus) 

  • A yardlong bean (Vigna unguiculata subsp. sesquipedalis) 

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