chopper vs helicopter

chopper

verb
  • To travel or transport by helicopter. 

noun
  • A tool for chopping wood; an axe/ax. 

  • A thick mitten, usually with yellow leather on the outside. 

  • The penis. 

  • A knife for chopping food, especially one with a large oblong blade. 

  • A helicopter. 

  • An assault rifle, especially a fully-automatic one (e.g. an AK-47). 

  • A type of road motorcycle, especially as used by biker/bikie gangs. 

  • A crude tool with an irregular cutting edge formed by removing flakes from one side of a stone. 

  • A high-bouncing batted ball. 

  • The bluefish (Pomatomus saltatrix). 

  • Any of various electronic switches used to interrupt one signal under the control of another. 

helicopter

verb
  • To transport by helicopter. 

  • To rotate like a helicopter blade. 

  • To overprotect one's children, as a helicopter parent does. 

  • To travel by helicopter. 

noun
  • A powered troweling machine with spinning blades used to spread concrete. 

  • A whirling trick performed with devil sticks. 

  • A dragonfly. 

  • The winged fruit of certain trees, such as ash, elm, and maple. 

  • An aircraft that is borne along by one or more sets of long rotating blades which allow it to hover, move in any direction including reverse, or land; and typically having a smaller set of blades on its tail that stabilize the aircraft. 

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