Digraph Frequency

The frequency count reflects the valid characters for the cipher type selected and will only show letters (A-Z), numbers (0-9) and hash (#). Other punctuation, including spaces, is ignored.

The first letter of each pair, shown on the left of the table, is always at an odd position in the cipher and the second letter, shown at the top, is at an even position. So, cipher text ABCDEF will show a count of three pairs (AB, CD and EF).

The end of the rows and columns displays the total number of pairs found beginning with the row letter label or those found ending with the column label.

In the example shown the letter pair ZH is found four times and ER one time. R appears 11 times as the first letter in a pair, and appears 5 times as the final letter of a pair.

Hovering the mouse over a value shows the digraph characters and the contact frequency. For example R precedes Z 4 times.

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