lucid vs rayless

lucid

adj
  • bright, luminous, translucent or transparent 

  • clear; easily understood 

  • mentally rational; sane 

noun
  • A lucid dream. 

rayless

adj
  • Lightless, gloomy. 

  • Lacking florets. 

  • Lacking rays. 

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