Try it now: Tap your hand on the desk randomly. Can you recall how many times you did it without "saying" a sequence in your head like "1, 2, 3" or "A, B, C" etc?
If yes, how far can you count? With a language it's effectively infinite. You could theoretically go up to "1 million 5 hundred 43 thousand, 2 hundred and 10" and effortlessly know what comes next.
X . . X . . X . . . X . X . . .
and every so often switch out for variations, eg: X . . X . . X . X . . . X . . .
or X . . . X . . . . . X . X . . .
but I'm no good for playing polyrhythms, which many other people can do, and I believe they must also do so more by feel than by counting.