breeder vs demonstrator

breeder

noun
  • A person who breeds plants or animals (professionally). 

  • A person who has had or who is capable of having children; a person who is focussed on the rearing of their own children. 

  • A heterosexual; i.e. one whose sexual intercourse can lead to breeding. 

  • A pattern that exhibits quadratic growth by generating multiple copies of a secondary pattern, each of which then generates multiple copies of a tertiary pattern. 

demonstrator

noun
  • One who demonstrates products in a retail environment; a merchandiser. 

  • The forefinger. 

  • One who demonstrates anything, or proves beyond doubt. 

  • An item, particularly a vehicle, used in demonstrations to a customer or user. 

  • An assistant to a lecturer. 

  • One who teaches anatomy from the dissected parts. 

  • One who takes part in a demonstration; a protester. 

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