locution vs term of address

locution

noun
  • The use of a word or phrase in an unusual or specialized way. 

  • A phrase or expression connected to an individual or a group of individuals through repeated usage. 

  • A supernatural revelation where a religious figure, statue or icon speaks, usually to a saint. 

  • Style of discourse or usage, or any particular utterance in such style. 

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 locution and term of address occurred in a corpus of books? (source: Google Ngram Viewer )