cafeteria vs refectory

cafeteria

noun
  • A dining area in an institution where meals may be purchased (as above), provided, or brought in from elsewhere. 

  • A restaurant in which customers select their food at a counter then carry it on a tray to a table to eat. 

refectory

noun
  • A dining hall, especially in an institution such as a college or monastery. 

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