continuum vs sum-total

continuum

noun
  • A continuous extent. 

  • The nondenumerable set of real numbers; more generally, any compact connected metric space. 

  • A continuous series or whole, no part of which is noticeably different from its adjacent parts, although the ends or extremes of it are very different from each other. 

  • A touch-sensitive strip, similar to an electronic standard musical keyboard, except that the note steps are ¹⁄₁₀₀ of a semitone, and so are not separately marked. 

sum-total

noun
  • Total. 

  • Entirety. 

  • Epitome. 

How often have the words continuum and sum-total occurred in a corpus of books? (source: Google Ngram Viewer )