nightcap vs red-eye

nightcap

noun
  • A beverage drunk before bed that is usually alcoholic. 

  • Something that a person reads or listens to before bed. 

  • The final match of a sporting contest, especially the second game of a baseball doubleheader. 

  • A warm cloth cap worn while sleeping, often with pajamas, being common attire in northern Europe before effective home heating became widespread. 

  • A cap drawn over the face of the condemned person before they are hanged. 

verb
  • To drink an alcoholic beverage shortly before retiring to bed. 

red-eye

noun
  • A drink consisting of beer with tomato juice. 

  • Either of two subspecies of the copperhead (Agkistrodon contortrix), a venomous pit viper native to the United States: either the broad-banded copperhead or Texas copperhead (Agkistrodon contortrix laticinctus), or the highland moccasin or northern copperhead (Agkistrodon contortrix mokasen). 

  • The redeye tetra (Moenkhausia sanctaefilomenae), a freshwater fish, commonly kept in aquariums, native to South America. 

  • The red-eyed vireo (Vireo olivaceus), a small American songbird. 

  • Redness in the eye(s) of someone in a colour photograph, as an unwanted consequence of light from a flash reflecting off blood vessels in the retina. 

  • Any of various sunfishes of the family Centrarchidae, especially the redeye bass (Micropterus coosae). 

  • A drink made by adding a shot of espresso to a cup of coffee. 

  • An overnight airplane flight. 

  • A strong but poor-quality whiskey. 

  • The red-eyed treefrog (Agalychnis callidryas), which is native to neotropical rainforests. 

  • Redness of the conjunctiva; especially when caused by conjunctivitis (pink-eye). 

  • The common rudd (Scardinius erythrophthalmus), a freshwater fish. 

  • A species of cicada, Psaltoda moerens, native to eastern Australia. 

  • Any of various round herrings of the genus Etrumeus. 

  • Any of various grass-skippers or hesperiid butterflies of the genus Matapa. 

verb
  • Often followed by it: to travel on a red-eye (“an overnight airplane flight”). 

How often have the words nightcap and red-eye occurred in a corpus of books? (source: Google Ngram Viewer )