ciao vs skol

ciao

intj

  • hello, hi. 

  • bye, goodbye. 

noun

  • A greeting or farewell using the word "ciao". 

skol

intj

  • A drinking-toast; cheers. 

verb

  • To down (a drink). 

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