circulate vs simulcast

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 

simulcast

verb
  • To broadcast a program or event across more than one medium or service at the same time. 

noun
  • A program or event that is broadcast across more than one medium or service at the same time. 

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