related vs relating

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 

relating

noun
  • The act of relating, or forming or identifying relationships; relation. 

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