tabes dorsalis vs venereal disease

tabes dorsalis

noun
  • neurosyphilis in the form of such degeneration. 

  • tabes of the back; a degeneration of the sensory neurons of the spinal cord carrying afferent information. 

venereal disease

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

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