“The research showed the site had been settled nearly 500 years earlier, 2800 years ago, than had previously been thought.”
Or in common terms that avoids common folk having to do the math - about 800 B.C.
Or along the same time frame as (as incomplete record):
https://en.wikipedia.org/wiki/8th_century_BC
That's not very much math; anyone who struggles with it is unlikely to gain much by reading, or listening to the podcast.