ladybug vs pest

ladybug

noun
  • Synonym of ladybird. 

pest

noun
  • An animal regarded as a nuisance, destructive, or a parasite, vermin. 

  • Any destructive insect that attacks crops or livestock; an agricultural pest. 

  • An annoying person, a nuisance. 

  • An invasive weed. 

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