calve vs farrow

calve

verb
  • to give birth to (a calf) 

  • to break off 

  • to shed (a large piece, e.g. an iceberg); to set loose (a mass of ice), e.g. a block of ice (coming off an iceberg) 

  • to assist in a cow's giving birth to a calf 

  • to shed a large piece, e.g. an iceberg or a smaller block of ice (coming off an iceberg) 

  • to give birth to a calf 

farrow

verb
  • To give birth to a (litter of piglets). 

adj
  • Not pregnant; not producing young (not calving) in a given season or year; barren. 

noun
  • A litter of piglets. 

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