obscene vs triple-X

obscene

adj
  • Offensive to standards of decency or morality. 

  • Disgusting or repulsive. 

  • Lewd or lustful. 

  • Liable to corrupt or deprave. 

  • Beyond all reason; excessive. 

triple-X

How often have the words obscene and triple-X occurred in a corpus of books? (source: Google Ngram Viewer )