protester vs striker

protester

noun
  • One who protests, either alone or in a public display of group feeling. 

  • One who protests a bill of exchange, or note. 

striker

noun
  • An individual who is on strike. 

  • A mechanism of a firearm acting upon the firing pin. 

  • An officer's servant or orderly. 

  • A piece of metal used to attract a magnet, or as a keeper for a magnet. 

  • A piece of metal struck against a flint or quartz-rock to produce sparks; a steel. 

  • A blacksmith's assistant who wields the sledgehammer. 

  • A piece used to push other pieces toward the pockets in the Asian game of carom. 

  • The batsman who is currently facing the bowler and defending his wicket. 

  • The batter. 

  • One of the players on a team in football (soccer) in the row nearest to the opposing team's goal, who are therefore principally responsible for scoring goals. 

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