equivalence vs sameness

equivalence

noun
  • The condition of being equivalent or essentially equal. 

  • The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valency. 

  • A number in intersection theory. A positive-dimensional variety sometimes behaves formally as if it were a finite number of points; this number is its equivalence. 

  • An equivalence relation; ≡; ~ 

  • A Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function. 

  • The relationship between two propositions that are either both true or both false. 

  • The degree to which a term or text in one language is semantically similar to its translated counterpart. 

verb
  • To be equivalent or equal to; to counterbalance. 

sameness

noun
  • The state of being equivalent; equality. 

  • The quality of being the same; identity. 

  • A tiring lack of variety; monotony. 

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