I have no idea. Sometimes Word just surprises me 😉
And you are right. Find is no solution since I must know what I am looking for. I sometimes use it if I suspect that I have used a quote before.
But I wish to find the duplicates that I am not aware of. So, the function should locate a sequence of 20 or 30 identical signs and spaces that appears more than once in the document.
Maybe a plugin or an other app?