Trezor seed or mnemonics can be daunting to recover.
Various Trezor software updates or hardware models use different type of derivation paths and mnemonic length.
There are two basic Trezor models, Model One and Trezor Model T.
Standard Trezor One word count is 24. Although newer Trezor wallets incorporates Shamirs Secret and can be 18 words.
When you write down your seed or mnemonic it is important to pay attention if you were using 2 x 12 columns or 3 x 4.