atmosphere vs overtone

atmosphere

noun
  • The apparent mood felt in an environment. 

  • The gases surrounding the Earth or any astronomical body. 

  • Extras in a scene who have no spoken lines. 

  • The conditions (such as music, illumination etc.) that can influence the mood felt in an environment. 

  • A unit of measurement for pressure equal to 101325 Pa (symbol: atm) 

  • The air in a particular place. 

overtone

noun
  • An implicit message (in a film, book, verbal discussion or similar) perceived as overwhelming the explicit message. 

  • A tone whose frequency is an integer multiple of another; a member of the harmonic series. 

verb
  • To give an overtone to. 

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