domestic cat vs pussums

domestic cat

noun
  • A domesticated cat, of the species Felis catus or Felis silvestris catus, especially one kept as a pet or for vermin control. 

pussums

noun
  • A term of endearment for a cat. 

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