collect vs flock

collect

verb
  • To come together in a group or mass. 

  • To get; particularly, get from someone. 

  • To infer; to conclude. 

  • To accumulate (a number of similar or related objects), particularly for a hobby or recreation. 

  • To gather together; amass. 

  • To collect payments. 

  • To collide with or crash into (another vehicle or obstacle). 

adv
  • With payment due from the recipient. 

noun
  • The prayer said before the reading of the epistle lesson, especially one found in a prayerbook, as with the Book of Common Prayer. 

adj
  • To be paid for by the recipient, as a telephone call or a shipment. 

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. 

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