pita vs pitta

pita

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

  • The plant which yields the fiber. 

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

pitta

noun
  • Any passerine belonging to the taxonomic family Pittidae. 

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