ass-licking vs sycophantic

ass-licking

noun
  • Sycophancy. 

  • Anilingus. 

sycophantic

adj
  • Obsequious, flattering, toadying. In other words, eager to please. 

How often have the words ass-licking and sycophantic occurred in a corpus of books? (source: Google Ngram Viewer )