English letter frequencies

Relative Frequencies of Letters in General English Plain text
From Cryptographical Mathematics, by Robert Edward Lewand

Letter	Frequency	Letter	Frequency
a	0.08167	n	0.06749
b	0.01492	o	0.07507
c	0.02782	p	0.01929
d	0.04253	q	0.00095
e	0.12702	r	0.05987
f	0.02228	s	0.06327
g	0.02015	t	0.09056
h	0.06094	u	0.02758
i	0.06966	v	0.00978
j	0.00153	w	0.02360
k	0.00772	x	0.00150
l	0.04025	y	0.01974
m	0.02406	z	0.00074

Tom's Letter Frequencies (in order)

By analyzing roughly 15000 characters, or roughly 2700 words from three separate sources, Tom came up with the statistics below. The three sources were:

The license agreement from Sun for JDK 1.2.1.
The teaching philosophy of a computer science professor from a liberal arts college in Minnesota.
A letter of recommendation for a national competition for innovative uses of technology in collegiate teaching.

General Letter Frequencies

e	0.124167
t	0.0969225
a	0.0820011
i	0.0768052
n	0.0764055
o	0.0714095
s	0.0706768
r	0.0668132
l	0.0448308
d	0.0363709
h	0.0350386
c	0.0344391
u	0.028777

m	0.0281775
f	0.0235145
p	0.0203171
y	0.0189182
g	0.0181188
w	0.0135225
v	0.0124567
b	0.0106581
k	0.00393019
x	0.00219824
j	0.0019984
q	0.0009325
z	0.000599

The top ten letters with frequencies, which occur at the beginning of words:

**Start of Word Letter Frequencies**
Letter	t	a	i	s	o	c	m	f	p	w
Freq	0.1594	0.155	0.0823	0.0775	0.0712	0.0597	0.0426	0.0408	0.040	0.0382

The top ten letters with frequencies, which occur at the end of words:

**End of Word Letter Frequencies**
Letter	e	s	d	t	n	y	r	o	l	f
Freq	0.1917	0.1435	0.0923	0.0864	0.0786	0.0730	0.0693	0.0467	0.0456	0.0408

The most common digrams (in order):
th, he, in, en, nt, re, er, an, ti, es, on, at, se, nd, or, ar, al, te, co, de, to, ra, et, ed, it, sa, em, ro.

The most common trigrams (in order):
the, and, tha, ent, ing, ion, tio, for, nde, has, nce, edt, tis, oft, sth, men