magnitude vs voluminousness

magnitude

noun
  • An order of magnitude. 

  • A measure of the energy released by an earthquake (e.g. on the Richter scale). 

  • A number, assigned to something, such that it may be compared to others numerically 

  • The absolute or relative size, extent or importance of something. 

  • Of a vector, the norm, most commonly, the two-norm. 

  • The apparent brightness of a star, with lower magnitudes being brighter; apparent magnitude 

  • A ratio of intensity expressed as a logarithm. 

voluminousness

noun
  • the state of being voluminous 

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