accord vs simultaneity

accord

noun
  • Agreement or harmony of things in general. 

  • Voluntary or spontaneous impulse to act. 

  • Agreement or concurrence of opinion, will, or action. 

  • A distinctive mixture of fragrances or the odor thereof. 

  • An agreement between parties in controversy, by which satisfaction for an injury is stipulated, and which, when executed, prevents a lawsuit. 

  • An international agreement. 

  • A harmony in sound, pitch and tone; concord. 

verb
  • To agree or correspond; to be in harmony; to be concordant. 

  • To grant as suitable or proper; to concede or award. 

  • To bring (people) to an agreement; to reconcile, settle, adjust or harmonize. 

  • To make to agree or correspond; to suit one thing to another; to adjust. 

  • To agree in pitch and tone. 

simultaneity

noun
  • The quality or state of being simultaneous; simultaneousness. 

  • More than one complete musical texture occurring at the same time. This first appeared in the music of Charles Ives, and is common in the music of Conlon Nancarrow, and others. 

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