filibuster vs procrastination

filibuster

noun
  • 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 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 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. 

procrastination

noun
  • The act of postponing, delaying or putting off, especially habitually or intentionally. 

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