addressee vs term of address

addressee

noun
  • A person or entity to whom discourse is directed, or the words referring to such an entity. 

  • The person or organization to which something, such as a letter or message, is addressed or sent, for whom the item is intended. 

term of address

noun
  • A word or phrase used to address or refer to someone or something without using his, her, or its name. 

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