Number of words to choose from: 28,977. That's quite a lot of potential combinations
While this page does make calls to a database to generate the combinatons, none of the resulting passphrases are stored in the database... I have no way of knowing if you copy a particular passphrase since they appear in blocks of ten at a time - plus I have no reason to store them or track the combinations which are generated.
There is another version of this generator, which doesn't take a word of your choice as the starting word... try the passphrase generator
I saw this password strength post on XKCD, which was posted on 10th August 2011.
There is all kinds of debate about how secure this method of generating passwords is, but I wanted to have a play with the method anyway. I think the advice in XKCD is still valid, from what I have read online. However, doubtless lots of people could find evidence to the contrary.
There's a lengthy piece about the XKCD approach via explainxkcd.com.