cougar vs puma

cougar

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

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

puma

noun
  • Any feline belonging to the genus Puma. 

  • A woman in her 20s or 30s who seeks relationships with younger men; a younger cougar. 

  • A mountain lion or cougar (Puma concolor). 

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