Just speculating here, but the goal of this comparison was to get an average in days from when unemployment starts to rise to the major historical bottoms of the S&P 500. After taking the total number of days from the 6 instances highlighted in the chart above we got an average of 427 days, which would put us roughly in August of 2023 for a potential bottom (Assuming we've bottomed in terms of unemployment and expect to rise over the next couple quarters).
Barring any black swans, I'm interested to see how this plays out.