maguey vs pita

maguey

noun
  • Any of various large agaves of Mexico and the southern US, especially the American aloe, Agave americana. 

pita

noun
  • A fiber obtained from the Agave americana and related species, used for making cordage and paper. 

  • A flat bread pouch used for making sandwiches such as gyros or falafels. 

  • The plant which yields the fiber. 

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