VI vs sextet

VI

name

  • VI (“U.S. Virgin Islands”) 

noun

  • verb, intransitive. 

sextet

noun

  • A composition for six voices or instruments. 

  • Any group of six people or things. 

  • A group of six singers or instrumentalists. 

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