genital herpes vs venereal disease

genital herpes

noun
  • A genital infection caused by herpes simplex viruses (mostly HHV2 but also HHV1). 

venereal disease

noun
  • Any of several contagious diseases, such as syphilis and gonorrhea, contracted through sexual intercourse. 

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