English letter frequencies in json format

letter_freq.json

{
    "a": 8.167,
    "b": 1.492,
    "c": 2.782,
    "d": 4.253,
    "e": 12.702,
    "f": 2.228,
    "g": 2.015,
    "h": 6.094,
    "i": 6.966,
    "j": 0.153,
    "k": 0.772,
    "l": 4.025,
    "m": 2.406,
    "n": 6.749,
    "o": 7.507,
    "p": 1.929,
    "q": 0.095,
    "r": 5.987,
    "s": 6.327,
    "t": 9.056,
    "u": 2.758,
    "v": 0.978,
    "w": 2.360,
    "x": 0.150,
    "y": 1.974,
    "z": 0.074
}

thx

Can I ask the source from where you got this data?

(From what I can tell, these numbers all look highly plausible, but I’d just feel better if I knew where the data was derived from?)

@handcoding no clue after 11 years. I suspect I would have stolen it from a wikipedia source but I can't be certain at this point.