clarity vs transparency

clarity

noun
  • The ability to be easily understood. 

  • The state or measure of being clear, either in appearance, thought or style; lucidity. 

transparency

noun
  • Openness; accessibility to scrutiny. 

  • Sufficient accuracy to make the compressed result perceptually indistinguishable from the uncompressed input. 

  • The quality of being transparent; transparence. 

  • A transparent artwork, viewable by shining light through it. 

  • A translucent film-like material with an image imprinted on it, viewable by shining light through it. 

  • A transparent object. 

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