This is the 16233rd most frequent Polish word.
upływem
"Upływem" means "the passage" or "lapse" of time.
In this sentence, 'upływem' means 'the passage of.' This usage indicates progression or movement of time.
Z upływem czasu, nauka staje się łatwiejsza.
Over time, learning becomes easier.
Here, 'upływem' means 'passing of,' specifically referring to the years that are going by.
Upływem lat przybywa doświadczeń.
With the passing years, experiences accumulate.
In this case, 'upływem' indicates the progression of days, marking a process over time.