fierce vs housebroken

fierce

adv
  • Extremely; very. 

adj
  • Excellent, very good. 

  • Exceedingly violent, severe, ferocious, cruel or savage. 

  • Resolute or strenuously active. 

  • Of exceptional quality, exhibiting boldness or chutzpah. 

  • Threatening in appearance or demeanor. 

housebroken

adj
  • Of animals: trained to avoid urinating or defecating in the house, except within a litterbox, toilet, or other receptacle. 

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