[fetywwrw] Arithmetic coding mnemonic

What are the frequencies of initial letters of words in English? (This should be easy.)

Set that constant and perform arithmetic coding, text compression, with it.  Actually, text decompression.  Start with a number you wish to memorize, uncompress it into a string of initials, and then create a mnemonic of words using those initials.  As opposed to straight base 26, we avoid, say, the letter X coming up so frequently.

Error correction would be nice.