appertain vs relate

appertain

verb
  • To belong to or be a part of, whether by right, nature, appointment, or custom; to relate to. 

  • To belong as a part, right, possession, attribute, etc. 

relate

verb
  • To identify with; to understand. 

  • To interact. 

  • To respond through reaction. 

  • To have a connection. 

  • To bring into a relation, association, or connection (between one thing and another). 

  • To tell in a descriptive way. 

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