scintillation vs sheen

scintillation

noun
  • A flash of light; a spark. 

  • The twinkling of a star or other celestial body caused by turbulence in the Earth's atmosphere. 

  • The flash of light produced by something (especially a phosphor) when it absorbs ionizing radiation. 

sheen

noun
  • Splendor; radiance; shininess. 

  • A thin layer of a substance (such as oil) spread on a solid or liquid surface. 

  • The letter ش in the Arabic script. 

adj
  • Beautiful, good-looking, attractive; radiant; shiny. 

verb
  • To shine; to glisten. 

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