glimmer vs headlamp

glimmer

noun
  • A flash of light. 

  • A faint or remote possibility. 

  • A faint light; a dim glow. 

verb
  • To shine with a faint, unsteady light. 

headlamp

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

  • A flashlight worn on the head. 

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