depression vs zip

depression

noun
  • The act of lowering or pressing something down. 

  • 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. 

  • 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. 

zip

noun
  • Energy; vigor; vim. 

  • The high-pitched sound of a small object moving rapidly through air. 

  • An ounce of marijuana. 

  • Synonym of convolution (“type of mapping function”) 

  • Zero; nothing. 

  • A zip fastener. 

  • A trip on a zipline. 

  • A zip file. 

intj
  • Imitative of high-pitched sound of a small object moving rapidly through air. 

verb
  • To move rapidly (in a specified direction or to a specified place) with a high-pitched sound. 

  • To close as if with a zip fastener. 

  • To subject to the convolution mapping function. 

  • To make (something) move quickly 

  • To compress (one or more computer files) into a single and often smaller file, especially one in the ZIP format. 

  • To move in haste (in a specified direction or to a specified place). 

  • To travel on a zipline. 

  • To close with a zip fastener. 

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