black-eyed pea vs common bean

black-eyed pea

noun
  • Any pale bean with a black spot. 

  • An African leguminous plant, of the species Vigna unguiculata, widely cultivated as food and forage, specifically Vigna unguiculata subsp. unguiculata. 

  • The edible seed of these plants. 

common bean

noun
  • A bean of such a plant, varying in size, shape and especially color. 

  • An herbaceous annual plant (Phaseolus vulgaris), grown for its edible bean. 

How often have the words black-eyed pea and common bean occurred in a corpus of books? (source: Google Ngram Viewer )