imperceptible vs notable

imperceptible

adj
  • beyond the purview of man; too great and all-encompassing to be perceived. 

  • not perceptible, not detectable, too small in magnitude to be observed 

notable

noun
  • A person or thing of distinction. 

adj
  • Worthy of note; remarkable; memorable; noted or distinguished. 

  • Easily noted (without connotations of value); clearly noticeable, conspicuous. 

  • That can be observed; perceptible. 

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