I sense some confusion.
While it's true that in English, we refer to 1900-1999 as the "nineteen hundreds", we also refer to it as the "twentieth century".
So, something occurring in the 1770s can be said to be in the "seventeen hundreds" (informally), but it is the "eighteenth century" (ordinally).
You're right, I confused it indeed.
I understand the difference between talking about the nineteen hundreds (same as the seventies) and the twentieth century. Thanks for pointing it out.
I had the above wrong. And my memory may be wrong about Brits counting as I stated above. They may have ineed talked aobut the "seventeen hundreds" and not the "seventeenth century" when talkling about 1701 - 1800.
But what I can bet on is that I learned at school that in English you have to count the centuries differently, as I stated above.
Of course, just because I learned it at school doesn't mean it has to be correct. After all, I also learned that there is no plural of chicken: one chicken - two chicken.
And I'm not the only one. My online dictionary discussion forum is full of Germans stating there is no plural to the word chicken, and native speakers arguing differently.
But maybe, maybe, this could be a BE/AE difference?