XXXX vs indecent

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. 

indecent

adj
  • Offensive to good taste. 

  • Generally unacceptable for public broadcasting but not legally obscene. 

  • Not in keeping with conventional moral values; improper, immodest, or unseemly. 

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