coffee cup vs joe

coffee cup

noun
  • A cup, typically a small one, in which coffee can be served. 

joe

noun
  • Coffee. 

  • Synonym of johannes (“An old Portuguese gold coin bearing a figure of John V of Portugal.”) 

  • A spy, especially a double agent. 

  • A male; a guy; a fellow. 

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