genital organ vs groin

genital organ

noun
  • An organ used in sexual reproduction or sexual stimulation; a sex organ; (in plural) genitalia. 

groin

noun
  • The genitals. 

  • The surface formed by two such vaults. 

  • The crease or depression of the human body at the junction of the trunk and the thigh, together with the surrounding region. 

  • The projecting solid angle formed by the meeting of two vaults 

  • The area adjoining this fold or depression. 

verb
  • To grunt; to growl; to snarl; to murmur. 

  • To build with groins. 

  • To deliver a blow to the genitals of. 

  • To hollow out; to excavate. 

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