Our analysis of more than 8,600 words with 5 letters shows that in order of frequency, the most common letters are: “S”, “E”, “A”, “O”, “R”, “I”, “L”, “T”, “N” and “D”.

Finally, it was found that the most commonly used letters in the 5-letter words (in terms of total and average frequency) are the letters A, E, S, O, R, I, L, T, etc.