orf vs thrush

orf

noun
  • An exanthemous disease caused by a parapox virus, occurring primarily in sheep and goats but also capable of infecting humans. 

prep
  • off 

adv
  • off 

adj
  • off 

thrush

noun
  • A fungal infection caused by Candida, now especially of the vagina; candidiasis. 

  • Any of numerous species of songbirds of the cosmopolitan family Turdidae, such as the song thrush, mistle thrush, bluebird, and American robin. 

  • A female singer. 

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