The First Exploit of cryptograpy is that 'e' and 't' are the most commonly used letters in the english language. This allows many weak cyphers to be cracked faster by simply assuming the most frequent character is 'e' or 't'.

While there are methods to obscure this distribution, this exploit plays a role in speeding up the process of decyphering nearly any cypher.

See if the distributions in your text match this pattern or if it is an outlier.