Here's why it's tricky:
* What counts as a word? Do we include proper nouns, technical terms, slang, or just common words found in a dictionary?
* What counts as "contain"? Do we only count words where the two "vs" are right next to each other (like "viscous"), or do we allow them to be separated by other letters (like "revisit")?
To get an answer, we would need to:
1. Define our criteria for what counts as a word and what counts as containing two "vs".
2. Search a comprehensive word list (like a dictionary or a large corpus of text) using our criteria.
It's likely that the number of words containing two "vs" would be relatively small, regardless of our definitions.
Let me know if you'd like to explore this further by setting specific criteria!