ellipsis vs omission

ellipsis

noun
  • The omission of a word or phrase that can be inferred from the context. 

  • A mark consisting of (in English) three periods, historically or more formally with spaces in between, before, and after them, " . . . ", or, more recently, a single character, "…", used to indicate that words have been omitted in a text or that they are missing or illegible, or (in mathematics) that a pattern continues (e.g., 1, ..., 4 means 1, 2, 3, 4). 

  • The omission of scenes in a film that do not advance the plot. 

omission

noun
  • The act of omitting. 

  • Something not done or neglected. 

  • The shortening of a word or phrase, using an apostrophe ( ' ) to replace the missing letters, often used to approximate the sound of speech or a specific dialect. 

  • An instance of those acts, or the thing left out thereby; something deleted or left out. 

  • The act of neglecting to perform an action one has an obligation to do. 

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