helicopter vs spile

helicopter

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

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

  • A whirling trick performed with devil sticks. 

  • A dragonfly. 

  • 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. 

spile

noun
  • A spout inserted in a maple (or other tree) to draw off sap. 

  • A pile; a post or girder. 

  • A spigot or plug used to stop the hole in a barrel or cask. 

verb
  • To provide (a barrel, tree etc.) with a spile. 

  • To support by means of spiles. 

  • spoil. 

  • To plug (a hole) with a spile. 

  • To draw off (a liquid) using a spile. 

  • To drive piles into. 

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