house cat vs mouser

house cat

noun
  • A domestic cat, Felis catus or Felis silvestris catus, commonly kept as a pet animal. 

  • A pet cat that is confined to, or almost permanently resides, inside the house. 

mouser

noun
  • A cat that catches mice, kept specifically for the purpose. 

  • A moustache. 

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