noticing vs onlook

noticing

noun
  • The act by which something is noticed. 

onlook

noun
  • The act of looking on (something); observation. 

  • One's perspective or outlook. 

  • That which is looked at, regarded, or considered. 

verb
  • To look on or look at; watch; observe; view; regard. 

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