nonidentical vs related

nonidentical

noun
  • A twin other than an identical twin. 

adj
  • Not identical; different in some respect. 

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 nonidentical and related occurred in a corpus of books? (source: Google Ngram Viewer )