flock vs troop

flock

verb
  • To congregate in or head towards a place in large numbers. 

  • To cover a Christmas tree with artificial snow. 

  • To coat a surface with dense fibers or particles; especially, to create a dense arrangement of fibers with a desired nap. 

  • To treat a pool with chemicals to remove suspended particles. 

noun
  • A large number of animals associated together in a group; commonly used of sheep, but (dated) also used for goats, farmed animals, and a wide variety of animals. 

  • Very fine sifted woollen refuse, especially that from shearing the nap of cloths, formerly used as a coating for wallpaper to give it a velvety or clothlike appearance; also, the dust of vegetable fibre used for a similar purpose. 

  • A large number of people. 

  • A number of birds together in a group, such as those gathered together for the purpose of migration. 

  • Those served by a particular pastor or shepherd.herd/flock 

  • Coarse tufts of wool or cotton used in bedding. 

  • A religious congregation. 

  • A lock of wool or hair. 

troop

verb
  • To move in numbers; to come or gather in crowds or troops. 

  • To march on; to go forward in haste. 

  • To move or march as if in a crowd. 

noun
  • Mushrooms that are in a close group but not close enough to be called a cluster. 

  • A group of meerkat families living together. 

  • A collection of people; a number; a multitude (in general). 

  • A company of actors; a troupe. 

  • A chapter of a national girl or boy scouts organization, consisting of one or more patrols of 6 to 8 youngsters each. 

  • A particular roll of the drum; a quick march. 

  • A group of baboons. 

  • A group of soldiers; military forces. 

  • A detachment of soldiers or police, especially horse artillery, armour, or state troopers. 

  • A small unit of cavalry or armour commanded by a captain, corresponding to a platoon or company of infantry. 

  • An individual soldier or member of a military force. 

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