breed vs herd

breed

verb
  • Of animals, to mate. 

  • To produce offspring sexually; to bear young. 

  • To arrange the mating of specific animals. 

  • To produce or obtain by any natural process. 

  • To have birth; to be produced, developed or multiplied. 

  • To yield or result in. 

  • To ejaculate inside; to attempt to impregnate. 

  • To take care of in infancy and through childhood; to bring up. 

  • To propagate or grow plants trying to give them certain qualities. 

  • To give birth to; to be the native place of. 

  • To educate; to instruct; to bring up 

  • To keep animals and have them reproduce in a way that improves the next generation’s qualities. 

noun
  • A race or lineage; offspring or issue. 

  • A group of people with shared characteristics. 

  • All animals or plants of the same species or subspecies. 

herd

verb
  • To unite or associate in a herd 

  • To manage, care for or guard a herd 

  • To act as a herdsman or a shepherd. 

  • To move or drive a herd. 

  • To associate; to ally oneself with, or place oneself among, a group or company. 

  • To unite or associate in a herd; to feed or run together, or in company. 

  • To form or put into a herd. 

noun
  • A number of domestic animals assembled together under the watch or ownership of a keeper. 

  • Any collection of animals gathered or travelling in a company. 

  • A crowd, a mass of people or things; a rabble. 

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