When building websites I always do this on a test domain. This domain was subdomain of the main one. Now I have an issue. I forgot to make sure that bots wouldn't crawl the web page while developing.
So after finding out, I removed the page and the entire domain. Note that this was months ago. But now when I go on google and enter
site:example.com I still get instances of the removed subdomain. This is despite that the website no longer exists. The domain doesn't exist either.
How is it still being found and how long does google take to realize the website doesnt exist anymore?