IMO this is the best way to safely store your seed phrase keys

1. Choose a book that’s written in native English and fairly modern (so wording doesn’t change between publications or translations). Ideally something less know, yet accessible. Distinctive cover would help to distinguish specific publication, for better accuracy.

2. Simply find all your seed phrase words chronologicaly in that book and make a note of them such as: 1024, 86, 11234, 501, 99, 23005, 788, 102567, 7654, 766, 12266, 9011

3. Now you can keep those numbers quite in the open and in different places because all you ever have to memorise now it what book is the key to unlock the phrase.

I strongly believe this very simple method is most ideal as you only have to memorise one thing. Even if someone gets a hold of your numbers, they first would have to realise what it is and then know what book unlocks it.

For you, you can have unlocking numbers in few places (never losing them) and only would have to get hold of unlocking book when you need it.

Finding the words might take hours yes, but it’s still better than losing them forever and this method is for hodlers, who want to keep it long time and will not access it too often.

For extra security you could say that the 1st word to start counting is actually a 10th word or something. That would make it even more impossible to decode and you’d still have just two things to memorise.