registration vs registry

registration

noun
  • The act of signing up or registering for something. 

  • The art of selecting and combining the stops or registers of an organ. 

  • That which registers or makes something official, e.g. the form or paper that registers. 

  • Alignment, e.g. of colors or other elements in a printing process. 

  • The location where guests register, especially with a hotel. 

registry

noun
  • The act of registering; registration. 

  • A building in which things are registered or where registers are kept. 

  • A record; an account; a register. 

  • A database of configuration settings etc. maintained by the Microsoft Windows operating system. 

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