Phaseolus vulgaris vs common bean

Phaseolus vulgaris

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 Phaseolus vulgaris and common bean occurred in a corpus of books? (source: Google Ngram Viewer )