body louse vs dildo

body louse

noun
  • A parasitic insect, Pediculus humanus humanus (syn. Pediculus humanus corporis), that infests the body and clothes of humans and feeds on blood. 

dildo

noun
  • An artificial phallus (penis) for sexual use. 

  • An idiot, a bore. 

  • A columnar cactus of the West Indies (Pilosocereus royenii). 

  • Any device or implement. 

verb
  • To penetrate with a dildo or with another object as if it were a dildo. 

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