headlamp vs moonbeam

headlamp

noun
  • An individual headlight, particularly of a motor vehicle. 

  • A flashlight worn on the head. 

moonbeam

noun
  • A shaft of moonlight. 

  • Moonlight generally. 

  • Any of various Australasian lycaenid butterflies of the genus Philiris. 

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