addition vs inclusion

addition

noun
  • The act of adding anything. 

  • The arithmetic operation of adding. 

  • A dot at the right side of a note as an indication that its sound is to be lengthened one half. 

  • Anything that is added. 

  • A title annexed to a person's name to identify him or her more precisely. 

  • Something added to a coat of arms, as a mark of honour. 

inclusion

noun
  • The act of including, i.e. adding or annexing, (something) to a group, set, or total. 

  • A mapping where the domain is a subset of the image. 

  • Anything foreign that is included in a material, 

  • Any material that is trapped inside a mineral during its formation, as a defect in a precious stone. 

  • A nuclear or cytoplasmic aggregate of stainable substances. 

  • An addition or annex to a group, set, or total. 

  • An object completely inside a tissue, such as epidermal inclusion cyst, a cyst in the epidermis. 

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