Letters Frequencies

The left table column contains each letter of the alphabet ordered by the frequency it occurred. The right column contains the most common English digraphs ordered by occurrence. Both columns are from a sample of 40,000 different English words.

This information is from a Cornell University’s Math Explorers’ Club (supported partly by the National Science Foundation). No further information is available on how these were calculated generated, but it corresponds closely with several cryptography textbooks I own.

Letters Digraphs
Letter Count Frequency
E 21912 12.02%
T 16587 9.10%
A 14810 8.12%
O 14003 7.68%
I 13318 7.31%
N 12666 6.95%
S 11450 6.28%
R 10977 6.02%
H 10795 5.92%
D 7874 4.32%
L 7253 3.98%
U 5246 2.88%
C 4943 2.71%
M 4761 2.61%
F 4200 2.30%
Y 3853 2.11%
W 3819 2.09%
G 3693 2.03%
P 3316 1.82%
B 2715 1.49%
V 2019 1.11%
K 1257 0.69%
X 315 0.17%
Q 205 0.11%
J 188 0.10%
Z 128 0.07%
Digraph Count Frequency
th 5532 1.52%
he 4657 1.28%
in 3429 0.94%
er 3420 0.94%
an 3005 0.82%
re 2465 0.68%
nd 2281 0.63%
at 2155 0.59%
on 2086 0.57%
nt 2058 0.56%
ha 2040 0.56%
es 2033 0.56%
st 2009 0.55%
en 2005 0.55%
ed 1942 0.53%
to 1904 0.52%
it 1822 0.50%
ou 1820 0.50%
ea 1720 0.47%
hi 1690 0.46%
is 1660 0.46%
or 1556 0.43%
ti 1231 0.34%
as 1211 0.33%
te 985 0.27%
et 704 0.19%
ng 668 0.18%
of 569 0.16%
al 341 0.09%
de 332 0.09%
se 300 0.08%
le 298 0.08%
sa 215 0.06%
si 186 0.05%
ar 157 0.04%
ve 148 0.04%
ra 137 0.04%
ld 64 0.02%
ur 60 0.02%