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An example of poly-alphabetic substitution  is

1. P-box
2. S-box
3. Caesar cipher
4. Vigenere cipher

https://www.math.cornell.edu/~mec/2003-2004/cryptography/polyalpha/polyalpha.html

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The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution. The Vigenère (French pronunciation: ​[viʒnɛːʁ])cipher has been reinvented many times

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