diet vs foodstuffs

diet

noun
  • A council or assembly of leaders; a formal deliberative assembly. 

  • Any habitual intake or consumption. 

  • A session of exams 

  • A controlled regimen of food and drink, as to gain or lose weight or otherwise influence health. 

  • The proceedings under a criminal libel. 

  • A clerical or ecclesiastical function in Scotland. 

  • The food and beverage a person or animal consumes. 

adj
  • Containing less fat, salt, sugar, or calories than normal, or claimed to have such. 

  • Having certain traits subtracted. 

verb
  • To modify one's food and beverage intake so as to decrease or increase body weight or influence health. 

  • To regulate the food of (someone); to put on a diet. 

foodstuffs

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