glanders vs mange

glanders

noun
  • An infectious disease of horses, mules and donkeys caused by the bacterium Burkholderia, one species of which may be transmitted to humans. 

mange

noun
  • A skin disease of nonhuman mammals caused by parasitic mites (Sarcoptes spp., Demodecidae spp.). 

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