danger zone vs genitalia

danger zone

noun
  • the genitals 

  • A specifically hazardous place to be avoided, usually demarcated, such as an area with anti-personnel mines 

genitalia

noun
  • External sex organs. 

  • Any sex organs, whether external or internal. 

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