cuntlicker vs muff diving

cuntlicker

noun

  • One who gives cunnilingus. 

  • A contemptible person. 

muff diving

noun

  • Cunnilingus. 

adj

  • Performing cunnilingus; that performs cunnilingus. 

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