cob vs troop horse

cob

noun
  • A horse having a stout body and short legs. 

  • A round, often crusty roll or loaf of bread. 

  • A cylinder with pins in it, encoding music to be played back mechanically by a barrel organ. 

  • A small fish, the miller's thumb. 

  • The seed-bearing head of a plant. 

  • A male swan. 

  • Any of the gold and silver coins that were minted in the Spanish Empire and valued in reales or escudos, such as the piece of eight—especially those which were crudely struck and irregularly shaped. 

  • A person of mixed black and white ancestry, especially a griffe; a mulatto. 

  • A corncob. 

  • A lump or piece of anything, usually of a somewhat large size, as of coal, or stone. 

  • A large fish, especially the kabeljou (variant spelling of kob). 

  • A punishment consisting of blows inflicted on the buttocks with a strap or a flat piece of wood. 

  • A gull, especially the black-backed gull (Larus marinus); also spelled cobb. 

  • A spider (cf. cobweb). 

  • A building material consisting of clay, sand, straw, water, and earth, similar to adobe; also called cobb, rammed earth or pisé. 

verb
  • To chip off unwanted pieces of stone, so as to form a desired shape or improve the quality of mineral ore. 

  • To throw, chuck, lob. 

  • To beat with a flat instrument; to paddle. 

  • To remove the kernels from a corncob. 

  • To construct using mud blocks or to seal a wall using mud or an artificial equivalent. 

  • To break up ground with a hoe. 

  • To have the heads mature into corncobs. 

  • To thresh. 

troop horse

noun
  • A cavalry horse. 

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