conferrer vs heavy hitter

conferrer

noun
  • A person who confers or bestows something 

heavy hitter

noun
  • A person of considerable importance who is a major decision maker or capable achiever; an especially significant organization or an especially functional object. 

  • A player with a favorable batting average who is especially good at hitting the ball deep into the outfield or farther. 

  • In any sport, a strong, physical player who is particularly effective. 

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