clear up vs pure

clear up

verb
  • To pot all of the remaining balls in a single turn. 

  • To depart or disappear. 

  • To clarify, to correct a misconception. 

  • To clean up. 

  • To become free of certain blemishes. 

  • Of stormy weather, to dissipate, to become calm. 

pure

verb
  • to hit (the ball) completely cleanly and accurately 

adv
  • to a great extent or degree; extremely; exceedingly. 

adj
  • Of a single, simple sound or tone; said of some vowels and the unaspirated consonants. 

  • Free of foreign material or pollutants. 

  • Free of flaws or imperfections; unsullied. 

  • Done for its own sake instead of serving another branch of science. 

  • Mere; that and that only. 

  • Without harmonics or overtones; not harsh or discordant. 

  • A lot of. 

  • Free of immoral behavior or qualities; clean. 

noun
  • One who, or that which, is pure. 

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