antithetical vs related

antithetical

adj
  • Pertaining to antithesis, or opposition of words and sentiments; containing, or of the nature of, antithesis; contrasted. 

related

adj
  • Fulfilling a relation. 

  • Standing in relation or connection. 

  • Being a relative of. 

  • Narrated; told. 

  • Synonym of relative. 

  • Having a relationship with the thing named 

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