Curve of Expected Remaining Time

From the curve presented, it is clear that the expected remaining time up to the complete coverage of the pond on the basis of linear thinking from visit point to visit point decreases in a nonlinear manner:

• On the 50th day, almost 300 years apparently remain.
• On the 100th day, almost 20 years apparently remain.
• On the 140th day, almost one year apparently remains.
• On the 150th day, almost one half year apparently remains.