bee vs true bug

bee

noun
  • A flying insect, of the clade Anthophila within the hymenopteran superfamily Apoidea, known for its organised societies (though only a minority have them), for collecting pollen and (in some species) producing wax and honey. 

  • A contest, especially for spelling; see spelling bee. 

  • The name of the Latin-script letter B. 

  • Any of the pieces of hard wood bolted to the sides of the bowsprit, to reeve the fore-topmast stays through. 

  • A community gathering to share labour, e.g. a sewing bee or a quilting bee. 

true bug

noun
  • Any of various insects of the order Hemiptera and in particular of the suborder Heteroptera, that are wingless or have two pairs of wings, and have mouthparts adapted for piercing and sucking. 

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