cockroach vs cootie

cockroach

noun
  • A person or a member of a group of people regarded as undesirable and rapidly procreating. 

  • A Tutsi. 

  • A person from New South Wales. 

  • A black or brown straight-winged insect of the order Blattodea. 

cootie

noun
  • Any germ or contaminant, real or imagined, especially from the opposite gender (for pre-pubescent children). 

  • A sideswiper, a type of telegraph key. 

  • A louse (Pediculus humanus). 

  • A nest-building female American coot (counterpart to cooter). 

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