assertion vs communication

assertion

noun
  • Something which is asserted; a declaration; a statement asserted. 

  • A statement in a program asserting a condition expected to be true at a particular point, used in debugging. 

  • A statement or declaration which lacks support or evidence. 

  • The act of asserting; positive declaration or averment. 

  • Maintenance; vindication 

communication

noun
  • An instance of information transfer; a conversation or discourse. 

  • A connection between two tissues, organs, or cavities. 

  • A trope by which a speaker assumes that his hearer is a partner in his sentiments, and says "we" instead of "I" or "you". 

  • A message; the essential data transferred in an act of communication. 

  • A passageway or opening between two locations; connection. 

  • Participation in Holy Communion. 

  • The concept or state of exchanging data or information between entities. 

  • The body of all data transferred to one or both parties during an act of communication. 

  • The act or fact of communicating anything; transmission. 

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