Seconds does not measure time, it compares two lengths of different scales. The motion of an oscillator and a unit length. What is measured is length. Nothing else can be measured.

Are you certain? A second is a measure of duration of time, which is standardized via the oscillations of a caeseium atom. There's no reference to length involved as far as I know.

Source: https://en.wikipedia.org/wiki/Unit_of_time#:~:text=A%20unit%....