completion vs omission

completion

noun
  • The act or state of being or making something complete; conclusion, accomplishment. 

  • The space resulting from such an act. 

  • The conclusion of an act of conveyancing concerning the sale of a property. 

  • The act of making a metric space complete by adding points. 

  • A forward pass that is successfully caught by the intended receiver. 

omission

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

  • 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. 

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

  • The act of omitting. 

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