R-rated vs rude

R-rated

adj
  • Not suitable for children, especially due to involving excessive sexual, violent, or rude content 

  • Of a motion picture, having an "R rating" from one more motion picture rating authorities, typically meaning it is suitable only for adults. 

  • Of a motion picture, having an "R rating" from the Motion Picture Association (MPA), meaning it is suitable only for adults. 

rude

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

  • Violent; abrupt; turbulent. 

  • Somewhat obscene, pornographic, offensive. 

  • 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 R-rated and rude occurred in a corpus of books? (source: Google Ngram Viewer )