illuminate vs question

illuminate

verb
  • To clarify or make something understandable. 

  • To be exposed to light. 

  • To shine light on something. 

  • To glow; to light up. 

  • To decorate the page of a manuscript book with ornamental designs. 

  • To decorate something with lights. 

  • To make spectacular. 

  • To direct a radar beam toward. 

noun
  • Someone thought to have an unusual degree of enlightenment. 

question

verb
  • To ask a question or questions; inquire or seek to know; examine. 

  • To ask questions of; to interrogate; to ask for information. 

  • To raise doubts about; have doubts about. 

noun
  • A subject or topic for consideration or investigation. 

  • A sentence, phrase or word which asks for information, reply or response; an interrogative. 

  • A proposal to a meeting as a topic for deliberation. 

  • A doubt or challenge about the truth, accuracy, or validity of a matter. 

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