scarlet runner vs string bean

scarlet runner

noun
  • Phaseolus coccineus, the runner bean 

string bean

noun
  • An immature runner bean (Phaseolus coccineus) 

  • A hyacinth bean (Lablab purpureus) 

  • Any long, slender green bean. 

  • A tall and thin person. 

  • A yardlong bean (Vigna unguiculata subsp. sesquipedalis) 

  • A common bean (Phaseolus vulgaris) 

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