banter vs depression

banter

verb
  • To delude or trick; to play a prank upon. 

  • To challenge to a match. 

  • To haggle; cheapen the price. 

  • To engage in banter or playful conversation. 

  • To play or do something amusing. 

  • To tease (someone) mildly. 

  • To joke about; to ridicule (a trait, habit, etc.). 

noun
  • Sharp, good-humoured, playful, typically spontaneous conversation. 

depression

noun
  • Four consecutive quarters of negative, real GDP growth. See NBER. 

  • A state of mind producing serious, long-term lowering of enjoyment of life or inability to visualize a happy future. 

  • A lowering, in particular a reduction in a particular biological variable or the function of an organ, in contrast to elevation. 

  • A period of major economic contraction. 

  • The act of lowering or pressing something down. 

  • A period of low morale or unhappiness (a period of experiencing the above-mentioned state of mind) which lasts longer than several weeks and may include ideation of self-inflicted injury or suicide. 

  • An area that is lower in topography than its surroundings. 

  • An area of lowered air pressure that generally brings moist weather, sometimes promoting hurricanes and tornadoes. 

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