intelligibility vs limpidness

intelligibility

noun
  • That which is intelligible; the degree to which something is intelligible. 

  • The quality of recorded speech of every word being understandable. 

limpidness

noun
  • The property of being limpid, clarity. 

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