runner bean vs scarlet runner

runner bean

noun
  • A climbing plant, Phaseolus coccineus, having long bean pods. 

  • The pods, sliced, as a vegetable. 

scarlet runner

noun
  • Phaseolus coccineus, the runner bean 

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