chaste vs venereal

chaste

adj
  • Abstaining from immoral or unlawful sexual intercourse. 

  • Decent, modest, morally pure. 

  • Virginal, innocent, having had no sexual experience. 

  • Austere, simple, undecorative. 

venereal

adj
  • Of or relating to the genitals or sexual intercourse. 

  • Of a disease: sexually transmitted; of or relating to, or adapted to the cure of, a venereal disease. 

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