cohesion vs simultaneity

cohesion

noun
  • State of cohering, or of working together. 

  • Grammatical or lexical relationship between different parts of the same text. 

  • Growing together of normally distinct parts of a plant. 

  • Various intermolecular forces that hold solids and liquids together. 

  • Degree to which functionally related elements in a system belong together. 

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