apex vs climax

apex

noun
  • The growing point of a shoot. 

  • The top of the food chain. 

  • The moment of greatest success, expansion, etc. 

  • The end or edge of a vein nearest the surface. 

  • A conical priest cap. 

  • The highest point in a plane or solid figure, relative to a base line or plane. 

  • The end of a leaf, petal or similar organ opposed to the end where it is attached to its support. 

  • The deepest part of a tooth's root. 

  • A diacritic in Middle Vietnamese that indicates /ŋ͡m/. 

  • The highest or the greatest part of something, especially forming a point. 

  • A diacritic in Classical Latin that resembles and gave rise to the acute. 

  • The lowest part of the human heart. 

  • The point on the celestial sphere toward which the Sun appears to move relative to nearby stars. 

  • A sharp upward point formed by two strokes that meet at an acute angle, as in "W", uppercase "A", and closed-top "4", or by a tapered stroke, as in lowercase "t". 

  • The lowest point on a pendant drop of a liquid. 

climax

noun
  • The culmination of a narrative's rising action, the turning point. 

  • A rhetorical device in which a series is arranged in ascending order. 

  • The final term of a rhetorical climax. 

  • The culmination of sexual pleasure, an orgasm. 

  • A culmination or acme: the last term in an ascending series 

  • The culmination of ecological development, whereby species are in equilibrium with their environment. 

verb
  • To reach or bring to a climax (in any sense). 

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