Bip39. First and foremost you must retail store it SEPARATELY from the seed. Having your seed along with your passphrase in a similar place defeats the objective of using a passphrase to begin with. None of those examples are worried about arguments that you'd use for differing types of typos, https://thesocialroi.com/story8381043/bip39-https-linktr-ee-bip39-the-bip39-wallet-diaries