Cryptogram Letter Frequency Tips
How to use letter frequency analysis to solve cryptograms faster. Includes the full English letter frequency chart and practical examples.
Letter frequency is one of the most powerful tools for solving cryptograms. The idea is simple: some letters show up more often than others in English text. If you know which letters are most common, you can make educated guesses about what the coded letters stand for.
The English Letter Frequency Chart
Here is the order from most common to least: E, T, A, O, I, N, S, H, R, D, L, C, U, M, W, F, G, Y, P, B, V, K, J, X, Q, Z. The letter E makes up about 13 percent of all text. T accounts for about 9 percent. A and O are around 8 percent each. At the other end, Q and Z make up less than 0.1 percent.
How to Use Frequency in a Puzzle
Count how many times each coded letter appears in the cryptogram. The one that shows up the most is probably E. The second most common is likely T or A. Fill in E and see if the partial words make sense. If they do, move on to T and A. If not, try T as the most common instead.
Frequency Works Best on Longer Puzzles
Short cryptograms (under 30 characters) do not always follow the standard frequency pattern. A short quote might have more Ts than Es just by chance. Longer puzzles with 50 or more characters tend to match the standard frequencies closely. The longer the puzzle, the more reliable this technique becomes.
Combine Frequency with Other Clues
Frequency alone will not solve a cryptogram. Combine it with single-letter word analysis, common word patterns, and apostrophe clues. For example, if you know the most common letter is E and you see a three-letter word that ends with that letter, try "the." Now you have three letters solved instead of one.
Practice with a Frequency Chart Handy
Print the letter frequency chart and keep it next to your puzzle. Over time, you will memorize the order and not need the chart anymore. Until then, it is a reference that saves you from guessing blindly.