début vs identity

début

noun
  • A person’s or thing’s first appearance before society or another audience; one’s “maiden voyage”. 

verb
  • To make one's début. 

identity

noun
  • A name or persona—a mask or appearance one presents to the world—by which one is known. 

  • An element of an algebraic structure which, when applied to another element under an operation in that structure, yields this second element. 

  • A well-known or famous person. 

  • The difference or character that marks off an individual or collective from the rest of the same kind; selfhood; the sense of who something or someone or oneself is, or the recurring characteristics that enable the recognition of such an individual or group by others or themself. 

  • An equation which always holds true regardless of the choice of input variables. 

  • Sameness, identicalness; the quality or fact of (several specified things) being the same. 

  • Any function which maps all elements of its domain to themselves. 

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