percipience vs perspicuousness

percipience

noun
  • perception 

  • The state or condition of being highly perceptive, as if in an almost hypnotic or telepathic state. 

perspicuousness

noun
  • The state or characteristic of being perspicuous; perspicuity. 

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