dilute vs upgrade

dilute

verb
  • To become attenuated, thin, or weak. 

  • To cause the value of individual shares or the stake of a shareholder to decrease by increasing the total number of shares. 

  • To weaken, especially by adding a foreign substance. 

  • To make thinner by adding solvent to a solution, especially by adding water. 

noun
  • An animal having a lighter-coloured coat than is usual. 

adj
  • Of an animal: having a lighter-coloured coat than is usual. 

  • Having a low concentration. 

  • Weak; reduced in strength by dilution; diluted. 

upgrade

verb
  • To improve in condition or status. 

  • To improve, usually applied to technology, generally by complete replacement of one or more components 

  • To replace with something better. 

  • To improve the equipment or furnishings of or services rendered to 

  • To replace a program with a later version of itself, a version having a higher version number or marketed under a more recent product name. 

noun
  • An upward grade or slope. 

  • An improvement 

  • An improved component or replacement item, usually applied to technology 

adv
  • Up a slope or grade. 

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