outshine vs top it off

outshine

verb
  • To shine brighter than something else 

  • To exceed something or someone else, especially in an obvious or flamboyant manner 

  • To shine forth. 

top it off

verb
  • To emphasize or underscore; to make something even better or worse. 

How often have the words outshine and top it off occurred in a corpus of books? (source: Google Ngram Viewer )