I wonder how the word is selected each day? If it's a random selection by machine that's one thing, but if it's chosen by human, then there might well be biases, either unconscious or conscious, towards obscure words or letter combinations.
There's a list of possible words embedded in the javascript[1], and some code that picks one at 'random' based on what your computer thinks the date is.
[1] Easily viewed in most browsers via the F12 key.
There are about 12,900 words in it...
That's pretty good going... my computer only knows about 6000 5-letter words (assuming non-letter characters like apostrophes aren't allowed).
kim@penelope:~$ egrep ^[a-Z]{5}$ /usr/share/dict/words | wc -l
6138Anyway, the important point is that words are being selected effectively at random, and the word list doesn't look like it's been curated by hand.
