champion vs conservationist

champion

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. 

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

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

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

  • Excellent; beyond compare. 

conservationist

noun
  • Someone who advocates for these actions. 

  • A person who maintains natural areas or protects threatened species. 

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