fast food vs mealtime

fast food

noun
  • Food that is served quickly, often standardized and pre-prepared. 

  • Anything standardized, quickly available, and inexpensive, often, of low value. 

  • A type of food that is quickly made, but of low nutritional value; junk food. 

mealtime

noun
  • The appointed time at which a meal is served or eaten. 

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