cunning linguist vs muff diving

cunning linguist

noun

  • One who performs cunnilingus. 

  • Used other than figuratively or idiomatically: see cunning, linguist. 

muff diving

noun

  • Cunnilingus. 

adj

  • Performing cunnilingus; that performs cunnilingus. 

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