brood vs incubator

brood

noun
  • The young of any egg-laying creature, especially if produced at the same time. 

  • Heavy waste in tin and copper ores. 

  • Parentage. 

  • The children in one family; offspring. 

  • The eggs and larvae of social insects such as bees, ants and some wasps, especially when gathered together in special brood chambers or combs within the colony. 

  • The young of certain animals, especially a group of young birds or fowl hatched at one time by the same mother. 

  • That which is bred or produced; breed; species. 

adj
  • Kept or reared for breeding. 

verb
  • (typically with about or over) To dwell upon moodily and at length, mainly alone. 

  • To be bred. 

  • To keep an egg warm to make it hatch. 

  • To protect (something that is gradually maturing); to foster. 

incubator

noun
  • An apparatus used to maintain environmental conditions suitable for the hatching of eggs. 

  • An apparatus used to maintain environmental conditions suitable for a newborn baby. 

  • Any apparatus used to maintain environmental conditions suitable for a reaction. 

  • A place to maintain the culturing of bacteria at a steady temperature. 

  • A support programme for the development of entrepreneurial companies. 

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