covey vs incubator

covey

noun
  • A brood of partridges, grouse, etc. 

  • A party or group (of persons or things). 

  • Coordinate terms: flock, gaggle, host 

  • A group of 8–12 (or more) quail. 

verb
  • To brood; to incubate. 

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 covey and incubator occurred in a corpus of books? (source: Google Ngram Viewer )