Roger vs how's your father

Roger

name
  • A male given name from the Germanic languages. 

  • A surname originating as a patronymic. 

  • Jolly Roger (pirate flag) 

how's your father

noun
  • Sexual intercourse. 

  • A whatsit; a thing which the speaker is unable or unwilling to specify more precisely. 

How often have the words Roger and how's your father occurred in a corpus of books? (source: Google Ngram Viewer )