abbreviation vs appendix

abbreviation

noun
  • A shortened or contracted form of a word or phrase, used to represent the whole, utilizing omission of letters, and sometimes substitution of letters, or duplication of initial letters to signify plurality, including signs such as +, =, @. 

  • The process of abbreviating. 

  • Reduction to lower terms, as a fraction. 

  • Any convenient short form used as a substitution for an understood or inferred whole. 

  • Loss during evolution of the final stages of the ancestral ontogenetic pattern. 

  • One or more dashes through the stem of a note, dividing it respectively into quavers, semiquavers, demisemiquavers, or hemidemisemiquavers. 

  • The result of shortening or reducing; abridgment. 

  • A notation used in music score to denote a direction, as pp or mf. 

appendix

noun
  • A text added to the end of a book or an article, containing additional information. 

  • Any process, prolongation, or projection. 

  • The vermiform appendix. 

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