cessation vs countdown

cessation

noun
  • A ceasing or discontinuance, for example of an action, whether temporary or final. 

countdown

noun
  • A radio or television program counting down the top songs of a given week, usually in reverse order ending with the No. 1. 

  • A count backward in fixed units to the time of some event, especially the launch of a space vehicle. 

  • The acts of preparation carried out during this period. 

verb
  • To count down. 

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