circulate vs conceal

circulate

verb
  • to spread or disseminate 

  • Of decimals: to repeat. 

  • to move in circles or through a circuit 

  • to cause (a person or thing) to move in circles or through a circuit 

  • to become widely known 

  • to move from person to person, as at a party 

conceal

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

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