and that would be how many potential passwords?
i pick a random order of a 52 card deck as my password. is that a strong password? you could just iterate over all of them. might take a whole though.
now my password is EITHER the song thing or a random order of a 52 card deck, you dont know which one. am i having a strong password yet?
"a web crawler could just read every page on the internet and then construct all the potential n-grams of every word of every page on the internet and then easily figure out your password" sounds slightly optimistic.
youd only have to clone half the google operation to crack some random weirdos password.