deflowerment vs dehymenization

deflowerment

noun
  • The loss of a girl or woman's virginity. 

dehymenization

noun
  • The act of deflowering; a venereal depriving of the hymen, and hence, pucelage; defloration. 

  • The surgical or gynecological removal of the hymen; hymenotomy. 

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