cameo vs earring

cameo

noun
  • A piece of jewelry, etc., carved in relief. 

  • A single very brief appearance, especially by a prominent celebrity in a movie or song. 

verb
  • To appear in a cameo role. 

earring

noun
  • A piece of jewelry worn on the ear. 

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