sameness vs turning point

sameness

noun
  • The quality of being the same; identity. 

  • A tiring lack of variety; monotony. 

  • The state of being equivalent; equality. 

turning point

noun
  • A crossroads. 

  • A T-junction. 

  • A decisive point at which a significant change or historical event occurs, or at which a decision must be made. 

  • A maximum or minimum on a graph. 

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