fast food vs food

fast food

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

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

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

food

noun
  • A foodstuff. 

  • Any solid substance that can be consumed by living organisms, especially by eating, in order to sustain life. 

  • Anything that nourishes or sustains. 

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