articulation vs locution

articulation

noun
  • The manner in which something is articulated (tongued, slurred or bowed). 

  • The interrelation and congruence of the flow of data between financial statements of an entity, especially between the income statement and balance sheet. 

  • The induction of a pupil into a new school or college. 

  • A joint or the collection of joints at which something is articulated, or hinged, for bending. 

  • A manner or method by which elements of a system are connected. 

  • The quality, clarity or sharpness of speech. 

  • The manner in which a phoneme is pronounced. 

locution

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

  • 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. 

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

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