pig pile vs swarm

pig pile

noun
  • A disorderly pile of people formed by jumping upon a victim. 

verb
  • To jump into such a pile. 

  • To cause a group of people to lie in a pile upon another, originally as a punishment to the victim on the bottom. 

  • To act similarly with regard to residential density: to live or cause to live in high-density settlements. 

swarm

noun
  • A mass of people, animals or things in motion or turmoil. 

  • A large number of insects, especially when in motion or (for bees) migrating to a new colony. 

  • A group of nodes sharing the same torrent in a BitTorrent network. 

verb
  • To fill a place as a swarm. 

  • To climb by gripping with arms and legs alternately. 

  • To overwhelm as by an opposing army. 

  • To breed multitudes. 

  • To move as a swarm. 

  • To teem, or be overrun with insects, people, etc. 

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