Where can I see a chart of minimum gas fee paid over time?

The x axis would be time and the y axis would be gwei and the line would be the LOWEST gas price paid in that time interval.

When you aren't in a hurry and want to make a good guess about low balling the gas fee so that it has a reasonable chance of clearing.

Like I'd like to look at the past 3 days and get the lowest. Because if my transaction clears in 3 days that's fine. The money savings is worth more than the cost of the delay. Which is the case sometimes in staking.