helicopter vs shiver

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. 

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. 

shiver

noun
  • A sheave or small wheel in a pulley. 

  • A small wedge, as for fastening the bolt of a window shutter. 

  • Collective noun for a group of sharks 

  • A bodily response to early hypothermia.ᵂᵖ 

  • The act of shivering. 

  • A fragment or splinter, especially of glass or stone. 

  • A variety of blue slate. 

verb
  • To tremble or shake, especially when cold or frightened. 

  • To cause to shake or tremble, as a sail, by steering close to the wind. 

  • To break into splinters or fragments. 

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