My collection of historic Quality Rater Guidelines:
https://drive.google.com/drive/folders/1pOqY8G4OnocoEAaus_pMaQEPOLjXTUO1?usp=sharing
A very useful set of documents for any SEO. The changes over time show clearly how Google shifts it's focus in search.
Latest addition dec 2022: an extra E for experience added to EAT.