Frequency Analysis Tool

The following samples were created using a substitution cipher (where each letter is replaced with a particular other letter). Comparing the frequencies of the letters in the sample with the most common letters in English, try to guess which letter corresponds to which.

Text to Analyze:

Sample 1 Sample 2 Sample 3 Sample 4

Frequencies:

Single letters:

(The letters E, T, A and O are the most common in English)

A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Bigrams:

(The pairs TH, ER, ON, and AN are the most common in English)


0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Guesses (clear guesses):

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z