likeness vs synonymia

likeness

noun
  • Appearance or form; guise. 

  • That which closely resembles; a portrait. 

  • The state or quality of being like or alike 

synonymia

noun
  • The use of two or more synonyms together to amplify or explain a given subject or term. A kind of repetition that adds force. 

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