observation vs perception

observation

noun
  • The act of observing, and the fact of being observed (see observance) 

  • The act of noting and recording some event; or the record of such noting. 

  • A remark or comment. 

  • A realization of a random variable. 

  • A judgement based on observing. 

  • Performance of what is prescribed; adherence in practice; observance. 

  • A regime under which a subject is routinely observed. 

  • Philosophically as: the phenomenal presence of human being existence. 

perception

noun
  • Conscious understanding of something. 

  • That which is detected by the five senses; not necessarily understood (imagine looking through fog, trying to understand if you see a small dog or a cat); also that which is detected within consciousness as a thought, intuition, deduction, etc. 

  • Vision (ability) 

  • The organisation, identification and interpretation of sensory information. 

  • Acuity 

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