filibuster vs picaroon

filibuster

noun
  • A mercenary soldier; a freebooter; specifically, a mercenary who travelled illegally in an organized group from the United States to a country in Central America or the Spanish West Indies in the mid-19th century seeking economic and political benefits through armed force. 

  • A tactic (such as giving long, often irrelevant speeches) employed to delay the proceedings of, or the making of a decision by, a legislative body, particularly the United States Senate. 

  • A member of a legislative body causing such an obstruction; a filibusterer. 

verb
  • To use obstructionist tactics in a legislative body. 

  • To take part in a private military action in a foreign country. 

picaroon

noun
  • A rogue. 

  • A pirate or picaro. 

  • A pirate ship. 

verb
  • To behave as a pirate. 

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