sharpen vs slake

sharpen

verb
  • To make sharp. 

  • To become sharp. 

slake

noun
  • A sloppy mess. 

verb
  • To cool (something) with water or another liquid. 

  • To satisfy (thirst, or other desires). 

  • To become mixed with water, so that a true chemical combination takes place. 

  • To besmear. 

  • To mix with water, so that a true chemical combination takes place. 

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