XXXX vs obscene

XXXX

adj
  • X-rated, pornographic 

name
  • a fuck / damn. 

  • Tetrasomy X, a rare chromosomal disorder affecting females, caused by the presence of four X chromosomes instead of two present in the usual human karyotype. 

obscene

adj
  • Offensive to standards of decency or morality. 

  • Disgusting or repulsive. 

  • Lewd or lustful. 

  • Liable to corrupt or deprave. 

  • Beyond all reason; excessive. 

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