+Frequency analysis is the study of the frequency of occurrence of letters, syllables, or other units in text or data. It is a fundamental technique in [Cryptography](/wiki/cryptography) for breaking simple substitution ciphers and understanding hidden patterns. This method also finds wide application in fields like [Linguistics](/wiki/linguistics) and data science for revealing underlying structures.
+## See also
+- [Cipher](/wiki/cipher)
+- [Statistical Analysis](/wiki/statistical_analysis)
+- [Pattern Recognition](/wiki/pattern_recognition)
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