elaboration vs expansion

elaboration

noun
  • The act or process of producing or refining with labor; improvement by successive operations; refinement. 

  • The process of taking a parsed tree of an abstract integrated circuit definition in a language such as Verilog and creating a hierarchy of module instances that ends with primitive (atomic) gates and statements. 

  • The natural process of formation or assimilation, performed by the living organs in animals and vegetables, by which a crude substance is changed into something of a higher order 

  • Setting up a hierarchy of calculated constants in a language such as Ada so that the values of one or more of them determine others further down in the hierarchy. 

  • The level of processing of a message or argument. 

expansion

noun
  • An act, process, or instance of expanding. 

  • A new addition. 

  • A product to be used with a previous product. 

  • That which is expanded; expanse; extended surface. 

  • The operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston. 

  • The replacement of a short name (e.g., acronym, initialism, alphanumeric symbol, abbreviation) with the longer name that is synonymous with it, as when spelling out acronyms to ensure clarity for a general audience. 

  • The string of text thus substituted. 

  • The fractional change in unit length per unit length per unit temperature change. 

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