phallic vs porno

phallic

adj

  • Relating to, or characteristic of the penis. 

  • Shaped like an erect human penis. 

porno

adj

  • Pornographic. 

noun

  • Pornography. 

  • A pornographic film. 

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