catchword vs lexeme

catchword

noun
  • A word or expression repeated until it becomes representative of a party, school, business, or point of view. 

  • The last word of a speech, serving as a cue for the next speaker. 

  • A word under the right-hand side of the last line on a book page that repeats the first word on the following page. 

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 catchword and lexeme occurred in a corpus of books? (source: Google Ngram Viewer )