green bean vs red bean

green bean

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

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

red bean

noun
  • Any of various red varieties of the common bean (Phaseolus vulgaris), including the kidney bean, Honduran red bean, and Salvadoran red bean. 

  • The azuki bean (Vigna angularis), most common in East Asia. 

  • The rice bean (Vigna umbellata). 

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