champion vs top-class

champion

adj
  • Excellent; brilliant; superb; deserving of high praise. 

  • Acting as a champion; having defeated all one's competitors. 

  • Excellent; beyond compare. 

verb
  • To promote, advocate, or act as a champion for (a cause, etc.). 

noun
  • Someone who fights for a cause or status. 

  • An ongoing winner in a game or contest. 

  • Someone who fights on another's behalf. 

  • A particularly notable member of a plant species, such as one of great size. 

  • Someone who is chosen to represent a group of people in a contest. 

top-class

adj
  • Of the highest quality. 

How often have the words champion and top-class occurred in a corpus of books? (source: Google Ngram Viewer )