flea bag vs sighthound

flea bag

noun
  • An unkempt mammal, especially a dog or cat. 

  • A poor and disreputable person. 

  • A sleeping bag. 

  • A disreputable place of accommodation. 

sighthound

noun
  • A hound that primarily hunts by sight and speed, instead of by scent and endurance. 

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