Which letters (or keys on your keyboard) do you use the most? Via Robert Allison: “For a simple first-test, I copy-n-pasted the text from my most recent blog post (the one about monitoring the number of M&Ms in our break room) into a text file, and wrote some code to import the text into SAS and count how many times each character (or number) was used. I then plotted that data on a simulated keyboard, and shaded each key based on the number of times that letter appeared in the text. Now you can easily see which letters I used most frequently.”
Hat tip: u/graphguy (via reddit)
prior probability 
Did you know it is called the Qwerty keyboard after the first 6 letters in the top row and it was designed to slow typists down because to prevent typewriters from jamming?
Yes, for that is the textbook example of a phenomenon economists call “path dependence”! But according to this report in The Economist, the QWERTY story (as an example of path dependence) is a myth: https://www.google.com/amp/s/amp.economist.com/finance-and-economics/1999/04/01/the-qwerty-myth
What!! It must be true – I read it on the Internet. Actually, I read about this “myth” years before the Internet (although I can’t remember where). Always liked the story.
Ditto!