conceal vs highlight

conceal

verb
  • To hide something from view or from public knowledge, to try to keep something secret. 

highlight

noun
  • An area or a spot in a drawing, painting, or photograph that is strongly illuminated. 

  • An especially significant or interesting detail or event or period of time. 

  • A strand or spot of hair dyed a different color than the rest. 

verb
  • To be a highlight of. 

  • To make prominent; emphasize. 

  • To seek the attention of (a user) on IRC by mentioning their name in a message, causing that message to appear highlighted on their screen. 

  • To mark (important passages of text), e.g. with a fluorescent marker pen or in a wordprocessor, as a means of memory retention or for later reference. 

  • To dye (part of the hair) a different color than the rest. 

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