least weasel vs mink

least weasel

noun
  • The common weasel, little weasel, or simply weasel (Mustela nivalis), the smallest member of the weasel genus Mustela, native to Eurasia, North America, and North Africa. 

mink

noun
  • Any of various semi-aquatic, carnivorous mammals in the Mustelinae subfamily, similar to weasels, with dark fur, native to Europe and America, of which two species in different genera are extant: the American mink (Neovison vison) and the European mink (Mustela lutreola). 

  • An article of clothing made of mink. 

  • The fur or pelt of a mink, used to make apparel. 

  • (plural minks) An individual with poor personal hygiene; a smelly person. 

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