heavy hitter vs mugwump

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. 

mugwump

noun
  • A (male) leader; an important (male) person. 

  • A member of the Republican Party who declined to support the party's nominee James G. Blaine (1830–1893) during the 1884 United States presidential election, believing him to be corrupt, and instead supported the Democratic Party's candidate Grover Cleveland (1837–1908). 

  • One who switches from supporting one political party to another, especially for personal benefit. 

  • A person who stays neutral or non-committal; a fence sitter; also, a person who maintains an aloof and often self-important demeanour. 

  • A person who purports to stay aloof from party politics. 

verb
  • To behave like a mugwump. 

  • To purport to stay aloof and independent, especially from party politics. 

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