cup of joe vs volition

cup of joe

noun
  • One’s personal preference. 

  • A cup of coffee. 

volition

noun
  • A conscious choice or decision. 

  • The mental power or ability of choosing; the will. 

  • A concept that distinguishes whether or not the subject or agent intended something. 

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