pooch vs sighthound

pooch

noun
  • A dog. 

  • A bulge, an enlarged part. 

  • A dog of mixed breed; a mongrel. 

  • A distended or swelled condition. 

verb
  • To distend, to swell or extend beyond normal limits; usually used with out. 

sighthound

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

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