digram
Two-character sequence
A digram is a sequence of two letters or characters.
In cryptography, digrams are analyzed to break codes, since certain letter pairs (like TH or HE in English) occur with predictable frequency.
In linguistics, the term overlaps with digraph—a two-letter combination representing a single sound, like SH or CH.
cryptography
Hidden writing system
- codeSymbolic communication system
- encryptionConverting data into code
- frequencyRate of recurrence
- substitutionExchange of one for another
cryptanalysis · codebreaking · plaintext · ciphertext · decryption · alphabet · key · pattern
cipher
Hidden writing system
- codeSymbolic communication system
- encryptionConverting data into code
- frequencyRate of recurrence
substitution · cryptanalysis · codebreaking · plaintext · ciphertext · decryption · alphabet · key · pattern · analysis
bigram
Two-element text sequence
- trigramThree-unit linguistic sequence
- morphemeSmallest meaningful language unit
- phonemeMinimal distinctive sound unit
grapheme · collocation · corpus · frequency · token · lexicon · sequence · adjacency · pair · letter