cougar vs wolfess

cougar

noun
  • An older woman who actively seeks the casual, often sexual, companionship of younger men, by implication a female “sexual predator”. 

  • Puma concolor, a wild feline native to the Americas. 

wolfess

noun
  • A predatory woman. 

  • A female wolf, a she-wolf. 

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