broad bean vs green bean

broad bean

noun
  • An edible bean that has broad seeds, Vicia faba. 

green bean

noun
  • The immature pods of any kind of bean plant, eaten as a vegetable. 

  • The immature pods of numerous varieties of the common bean, Phaseolus vulgaris. 

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