Agnius Vasiliauskas

$\begingroup$ It's a fair question. Let's start with the related question: Are there individual electrons in an atom? Here the answer is generally "no." By definition, all of the electrons in an atom are indistinguishable, which can arguably be rephrased to say that any electron in the electron cloud is the same electron as any other one.

This question, and the answers thereto, make it seem like there's something unusual about time. There isn't. Processes with characteristic duration are the set of all repeating or repeatable processes whose periods (or the average of a large number of periods) are expressible as a fixed ratio of any other process in the set. A duration is a number times one of those periods.