ingression vs startup

ingression

noun
  • The act or process of entering or intruding. 

  • The process by which a potentiality enters into actuality. 

  • The inward migration of cells from the blastula during gastrulation. 

startup

noun
  • The act or process of starting a process or machine. 

  • A new company or organization or business venture designed for rapid growth. 

  • A folder (especially in Windows), containing shortcuts of applications or programs that start up automatically after a user signs in. 

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