fink vs mustela

fink

noun
  • Any of several birds in the family Ploceidae native to southern Africa. 

  • An informer. 

  • A strikebreaker. 

  • A contemptible person. 

verb
  • To betray a trust; to inform on. 

mustela

noun
  • Any of the carnivorous mammals of the genus Mustela. 

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