installment vs simulcast

installment

noun
  • One of a series of parts, whether equal or unequal to the other parts of the series, of a given entity or a given process, which part presents or is presented at a particular scheduled interval. 

  • A part of a published or broadcast serial. 

  • One member of a series of portions of a debt or sum of money, which portions may or may not be equated (depending in part on whether the interest rate is fixed or variable), payment of which portions are serially exacted at regularly scheduled intervals toward satisfaction of the total. Payments of installments are generally mensual, quarterly, triannual, biannual, or annual. 

  • The act of installing; installation. 

simulcast

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

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

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