mother's mark vs vole

mother's mark

noun
  • A congenital mark upon the body; a naevus. 

vole

noun
  • Any of a large number of species of small rodents of the subfamily Arvicolinae of the family Cricetidae which are not lemmings or muskrats. 

  • A deal in a card game, écarté, that draws all the tricks. 

verb
  • To win all the tricks by a vole. 

How often have the words mother's mark and vole occurred in a corpus of books? (source: Google Ngram Viewer )