XXX vs rude

XXX

adj
  • Extra strong; very high quality. 

  • Designating extreme or hardcore pornography. 

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). 

noun
  • Triple X syndrome. 

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

rude

adj
  • Violent; abrupt; turbulent. 

  • Somewhat obscene, pornographic, offensive. 

  • Lacking in refinement or civility; bad-mannered; discourteous. 

  • Undeveloped, unskilled, inelegant. 

  • Hearty, vigorous; found particularly in the phrase rude health. 

  • Crudely made; primitive. 

  • Lacking refinement or skill; untaught; ignorant; raw. 

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