capsule vs cough drop

capsule

noun
  • A small container containing a dose of medicine. 

  • A membranous envelope. 

  • A tough, fibrous layer surrounding an organ such as the kidney or liver 

  • A detachable part of a rocket or spacecraft (usually in the nose) containing the crew's living space. 

  • A type of simple, dehiscent, dry fruit (seed-case) produced by many species of flowering plants, such as poppy, lily, orchid, willow and cotton. 

  • The covering — formerly lead or tin, now often plastic — over the cork at the top of the wine bottle. 

  • A membrane that surrounds the eyeball 

  • A small cup or shell, often of metal, for a percussion cap, cartridge, etc. 

  • A sporangium, especially in bryophytes. 

  • in a brief, condensed or compact form 

  • A small, shallow evaporating dish, usually of porcelain. 

verb
  • To encapsulate or summarize. 

  • To form (medicine, etc.) into capsules. 

cough drop

noun
  • A small, medicated tablet intended to be dissolved slowly in the mouth to relieve coughing symptoms temporarily. 

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