blues vs empty space

blues

noun
  • A feeling of sadness or depression. 

  • Any of various blue pills sold on the street, mimicking the appearance of prescription pain killer tablets but often laced with fentanyl that leads to overdose deaths (see opioid epidemic). 

  • One's particular life experience, particularly including the hardships one has faced. 

  • New South Wales. 

  • Manchester City FC. 

  • A musical form, African-American in origin, generally featuring an eight-bar or twelve-bar blues structure and using the blues scale. 

  • Carlton Football Club. 

  • A musical composition following blues forms. 

  • Everton FC. 

  • The negative emotional state produced by a particular action, occupation, experience or idea. 

  • A uniform made principally of a blue fabric, and especially a full dress uniform thus colored. 

  • Chelsea FC. 

  • Birmingham City FC. 

empty space

noun
  • A feeling of longing for someone or something that is gone; a sense of a thing's absence. 

  • Vacuum; a space containing nothing at all 

  • An unoccupied space where something may be stored 

  • An unoccupied area or volume. 

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