pure vs sky

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. 

sky

verb
  • To hit, kick, or throw a ball extremely high. 

  • To move quickly, as if by flying; to fly; also, to escape, to flee (especially by airplane). 

  • To hit, kick, or throw (a ball) extremely high. 

  • To clear (a high jump bar, hurdle, etc.) by a large margin. 

  • To raise an oar too high above the water. 

  • To drink (a beverage) from a container without one's lips touching the container. 

noun
  • The atmosphere above a given point, especially as visible from the surface of the Earth as the place where the sun, moon, stars, and clouds are seen. 

  • With a descriptive word: the part of the sky which can be seen from a specific place or at a specific time; its climate, condition, etc. 

  • The set of all lightlike lines (or directions) passing through a given point in space-time. 

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