It never fully stops and that is not the useful thing to measure. Ten years in I still look up date formatting strings and argument order for the less common standard library calls, every single time.
What does change is the shape of the searches. At four months you search for syntax. Later you search for behaviour, things like what happens to this when the connection drops halfway. The day you notice your searches have stopped being how do I write X and become which of these two approaches breaks first, that is the progress marker.