David brought up the question of the number of letters in the Torah, and why there was a difference between the list presented on aishdas.org and my database which is derived from the BHS (4th edition). I don't know which document aishdas used, but here is the results of a comparison I produced today:
In my analysis I found that four letters had exactly the same frequency as reported by aishdas, and ten had a difference between 1 and 3. So the documents are very close. But there is a big mystery concerning the distribution of Vav, Yod, Mem, Nun, and Tzaddi which have differences of 24, 34, 12, 21 and -90, respectively. The last value is very strange. I triple checked my results since it seems impossible that there could be a difference of 90 Tzaddis in the two documents. I suspect that the number reported by aishdas is a mistake.
So there's the data.