noticeability vs perspicuity

noticeability

noun
  • The quality of being easy to see or notice. 

perspicuity

noun
  • Clarity, lucidity, especially in expression; the state or characteristic of being perspicuous. 

  • Transparency; translucence. 

  • Perspicacity; insight. 

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