XXX vs pure

XXX

noun
  • Triple X syndrome. 

adj
  • Extra strong; very high quality. 

  • Designating extreme or hardcore pornography. 

verb
  • To delete; to cross out, especially to conceal or suggest vulgar language. 

symbol
  • An indicator of hazard or poison. 

  • Traditional brewer's mark for barrels of extra strong beer—extended to other alcoholic beverages and other products having an extra strong dimension (varying from laundry soap to pornography). 

pure

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

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

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 XXX and pure occurred in a corpus of books? (source: Google Ngram Viewer )