moorhen vs sow

moorhen

noun
  • A female red grouse, Lagopus lagopus scotica. 

  • Any of various medium-sized water birds of the genus Gallinula, of the rail family, that feed in open water margins. 

sow

noun
  • A female guinea pig. 

  • A mass of metal solidified in a mold. 

  • A sowbug. 

  • A female bear, she-bear. 

  • A contemptible, often fat woman. 

  • A channel that conducts molten metal to molds. 

  • A kind of covered shed, formerly used by besiegers in filling up and passing the ditch of a besieged place, sapping and mining the wall, etc. 

  • A female pig. 

verb
  • To scatter over; to besprinkle. 

  • To scatter, disperse, or plant (seeds). 

  • To spread abroad; to propagate. 

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