The Stone Age is such a ridiculously broad time period.
From Wikipedia[1]:
> The Stone Age was a broad prehistoric period during which stone was widely used to make stone tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years and ended between 4,000 BC and 2,000 BC.
So, 3.4 million years out of (generously) the last (3.4 million + 6,023) years were the Stone Age. 99.82% of "human" history (of course appreciating that modern homo sapien didn't appear until 300,000-ish years ago).