paddock vs pen

paddock

noun
  • A field of grassland of any size, either enclosed by fences or delimited by geographical boundaries, especially a large area for keeping cattle or sheep. 

  • An enclosure next to a racecourse where horses are paraded and mounted before a race and unsaddled after a race. 

  • A small enclosure or field of grassland, especially one used to exercise or graze horses or other animals. 

  • A field on which a game is played; a playing field. 

  • A place in a superficial deposit where ore or washdirt (“earth rich enough in metal to pay for washing”) is excavated; also, a place for storing ore, washdirt, etc. 

  • A toad. 

  • An area at a racing circuit where the racing vehicles are parked and worked on before and between races. 

  • A frog. 

  • A simple, usually triangular, sledge which is dragged along the ground to transport items. 

  • A contemptible, or malicious or nasty, person. 

verb
  • To enclose or fence in (land) to form a paddock. 

  • To excavate washdirt (“earth rich enough in metal to pay for washing”) from (a superficial deposit). 

  • To place or keep (cattle, horses, sheep, or other animals) within a paddock (noun sense 1 or 2.4); hence, to provide (such animals) with pasture. 

pen

noun
  • An enclosure (enclosed area) used to contain domesticated animals, especially sheep or cattle. 

  • Penitentiary, i.e. a state or federal prison for convicted felons. 

  • The internal cartilage skeleton of a squid, shaped like a pen. 

  • A female swan. 

  • Penalty. 

  • A writer, or their style. 

  • The bullpen. 

  • Marks of ink left by a pen. 

  • A light pen. 

  • A wing. 

  • A tool, originally made from a feather but now usually a small tubular instrument, containing ink used to write or make marks. 

verb
  • To enclose in a pen. 

  • To write (an article, a book, etc.). 

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