diagnosis vs identification

diagnosis

noun
  • The identification of the nature and cause of something (of any nature). 

  • A written description of a species or other taxon serving to distinguish that species from all others; especially a description written and published in Latin. 

  • The identification of the nature and cause of an illness. 

verb
  • Synonym of diagnose 

identification

noun
  • The act of identifying (i.e., which one, which thing). 

  • The combination of identifying (which one, which thing) and validating the identity (proving or confirming it); identifying and authenticating viewed as a unitary concept in cognition. 

  • A feeling of support, sympathy, understanding, or belonging towards somebody or something. 

  • A particular instance of identifying something. 

  • A document or documents serving as evidence of a person's identity. 

  • The state of being identified. 

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