canonical form vs lexeme

canonical form

noun
  • Synonym of dictionary form 

  • A standard or normal presentation of a mathematical entity or a text string, etc. 

  • Any of a set of representations of the resonance structure of a molecule each of which contributes to the real structure; a contributing structure. 

lexeme

noun
  • The word-form chosen to represent such a set or family. 

  • The set itself; a lexemic family. 

  • The abstract minimum unit of language or meaning that underlies such a set. 

  • An individual instance of a continuous character sequence without spaces, used in lexical analysis (see token). 

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