coordination vs simultaneity

coordination

noun
  • The resulting state of working together; cooperation; synchronization. 

  • The ability to coordinate one's senses and physical movements in order to act skillfully. 

  • An equal joining together of two or more phrases or clauses, for example, using and, or, or but. 

  • The reaction of one or more ligands with a metal ion to form a coordination compound. 

  • The act of coordinating, making different people or things work together for a goal or effect. 

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 coordination and simultaneity occurred in a corpus of books? (source: Google Ngram Viewer )