pooch vs stray dog

pooch

noun
  • A dog of mixed breed; a mongrel. 

  • A bulge, an enlarged part. 

  • A dog. 

  • A distended or swelled condition. 

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

stray dog

noun
  • An ownerless dog, a roaming wild or half-wild dog. 

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