barn swallow vs pouch

barn swallow

noun
  • Hirundo rustica, the most widespread species of swallow in the world; a distinctive passerine bird with blue upperparts, a long, deeply forked tail and curved, pointed wings, is found in Europe, Asia, Africa and the Americas. 

pouch

noun
  • A bulkhead in the hold of a vessel, to prevent grain etc. from shifting. 

  • Any pocket or bag-shaped object, such as a cheek pouch. 

  • A small bag usually closed with a drawstring. 

  • A cyst or sac containing fluid. 

  • A silicle, or short pod, as of the shepherd's purse. 

  • An organic pocket in which a marsupial carries its young. 

verb
  • To enclose within a pouch. 

  • To transport within a pouch, especially a diplomatic pouch. 

  • To swallow. 

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