flyer vs helicopter

flyer

noun
  • That which flies, as a bird or insect. 

  • A person who is lifted and/or thrown by another person or persons. 

  • A machine that flies. 

  • A leaflet, often for advertising. 

  • The part of a spinning machine that twists the thread as it takes it to and winds it on the bobbin 

  • A leap or jump. 

  • A risky investment or other venture. 

  • A fast-moving person or thing. 

  • A false start 

  • An arch that connects a flying buttress into the structure it supports. 

  • A stray shot away from the group on a target. 

  • A person who travels by airplane. 

  • A standard rectangular step of a staircase (as opposed to a winder). 

  • A female kangaroo; a roo; a doe; a jill. 

verb
  • To distribute flyers (leaflets). 

  • To distribute flyers in (a location) or to (recipients). 

helicopter

noun
  • A dragonfly. 

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

  • A whirling trick performed with devil sticks. 

  • 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. 

verb
  • To rotate like a helicopter blade. 

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

  • To travel by helicopter. 

  • To transport by helicopter. 

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