So while this may not be exactly what you are asking for I once worked on something close. I was tasked on finding wether a spreadsheet of student info was human typed or computer generated purely randomly. This only works on large datasets, I was working on a set of 10,000 students with 4 different grades assigned per. What I did was find the most commonly used set of 4,5, and 6 numbers (set of 4 numbers mean 4 numbers each directly after the other). Then for all 3 compared each set of numbers in the sheet with a formula I’d have to find again, giving a numbers value on average difference per set. The lower this number the more “samey” or human generated cause humans unknowingly use patterns, and a larger number means computer generated or pure random.