American cheese vs Cheddar

American cheese

noun
  • A common processed cheese, yellow, or white in colour and mild in flavour, with a medium-firm consistency. 

Cheddar

noun
  • Cheddar cheese. 

name
  • A village in Somerset, England famous for its cheese, and also for its gorge, caves and remains of early man found in them. 

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