dipteran vs topping

dipteran

noun
  • An insect of the large order Diptera; a fly. 

adj
  • Relating to or denoting dipterans. 

topping

noun
  • The tail of an artificial fly. 

  • Either of the cables that support the ends of a spar or boom. 

  • Any food item added on top of another, such as sprinkles on ice cream or pepperoni on pizza. 

  • The act of cutting off the top of something. 

  • The act of raising one extremity of a spar higher than the other. 

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