plantain vs ribwort

plantain

noun
  • A plant of the genus Plantago, with a rosette of sessile leaves about 10 cm (4") long with a narrow part instead of a petiole, and with a spike inflorescence with the flower spacing varying widely among the species. See also psyllium. 

  • The fruit of the plant, usually cooked before eating and used like potatoes. 

  • A plant in the genus Musa, the genus that includes banana, but with lower sugar content than banana. 

ribwort

noun
  • ribgrass; Old World plantain, Plantago lanceolata. 

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