Frequencies of letters in a (reasonably long) English text are
approximately given by:


a .082
b .015
c .028
d .043
e .127
f .022
g .020
h .061
i .070
j .002
k .008
l .040
m .024
n .067
0 .075
p .019
q .001
r .060
s .063
t .091
u .028
v .010
w .023
x .001
y .020
z .001