XXX vs proper

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). 

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

noun
  • Triple X syndrome. 

proper

adv
  • properly; thoroughly; completely. 

  • properly. 

adj
  • Suited or acceptable to the purpose or circumstances; fit, suitable. 

  • Following the established standards of behavior or manners; correct or decorous. 

  • Eigen-; designating a function or value which is an eigenfunction or eigenvalue. 

  • Belonging to oneself or itself; own. 

  • Being strictly part of some other thing (not necessarily explicitly mentioned, but of definitional importance), and not being the thing itself. 

  • In the strict sense; within the strict definition or core (of a specified place, taxonomic order, idea, etc). 

  • Used to designate a particular person, place, or thing. Proper nouns are usually written with an initial capital letter. 

  • Pertaining exclusively to a specific thing or person; particular. 

  • Excellent, of high quality; such as the specific person or thing should ideally be. (Now often merged with later senses.) 

  • Attractive, elegant. 

  • In the very strictest sense of the word. 

  • Portrayed in natural or usual coloration, as opposed to conventional tinctures. 

  • Utter, complete. 

noun
  • A part of the Christian liturgy that varies according to the date. 

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