moniker vs screen name

moniker

noun
  • A personal name or nickname; an informal label, often drawing attention to a particular attribute. 

  • A person's signature. 

  • An object (structured item of data) used to associate the name of an object with its location. 

screen name

noun
  • a pseudonym used for Internet communications 

  • Synonym of stage name 

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