cogitating vs reflecting

cogitating

reflecting

adj
  • That reflects. 

  • Having a component that reflects light. 

  • Given to introspection; thoughtful, reflective. 

  • That has been reflected (of light, sound etc.); undergoing reflection. 

noun
  • An instance of reflection 

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