ellipsis vs synecdoche

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. 

synecdoche

noun
  • The use of this figure of speech. 

  • A figure of speech that uses the name of a part of something to represent the whole, or the whole to represent a part. 

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