boil vs depression

boil

noun
  • The point at which fluid begins to change to a vapour; the boiling point. 

  • A dish of boiled food, especially seafood. 

  • A social event at which people gather to boil and eat food, especially seafood. (Compare a bake or clambake.) 

  • The collective noun for a group of hawks. 

  • A localized accumulation of pus in the skin, resulting from infection. 

verb
  • To form, or separate, by boiling or evaporation. 

  • To feel uncomfortably hot. 

  • To be moved or excited with passion; to be hot or fervid. 

  • To bring to a boil, to heat so as to cause the contents to boil. 

  • To begin to turn into a gas, seethe. 

  • To heat to the point where it begins to turn into a gas. 

  • To be uncomfortably hot. 

  • To cook in boiling water. 

  • To be agitated like boiling water; to bubble; to effervesce. 

depression

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

  • 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. 

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