Claire left Jamie in 1746 and returned to Frank in 1947. That is a 202 year difference.
She traveled with Jamie’s father’s ring and it was missing the stone when she got to 1948.
Geillis/Gillian goes through the stones in 1968 and clearly travels back more than 203 years because she’s there before Claire. We don’t know if she got there 1 or 5 years before but if she got there 5 minutes before then she went back 225 years. Clearly she was there enough time to establish herself and seduce Arthur Duncan into marriage so I’d guess 230 years.
