covey vs puddling

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. 

puddling

noun
  • A group of mallards (ducks). 

  • The act of lining a canal with puddle to make it watertight. 

  • The action of forming a puddle. 

  • The first true industrial process to produce steel from pig iron. 

  • A behaviour in which animals like butterflies seek out moist substances to obtain nutrients. 

  • The process of working clay, loam, pulverized ore, etc., with water, to render it compact, or impervious to liquids. 

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