Temporal cohesion means
Cohesion with respect to time
Cohesion measures how closely the elements inside one module belong together. From weakest to strongest the levels are: coincidental, logical, temporal, procedural, communicational, sequential and functional.
In temporal cohesion the elements of a module are grouped only because they are executed at the same time (in the same phase of execution) — for example an initialisation module that opens files, clears counters and sets flags at program start-up.
So temporal cohesion is cohesion with respect to time. It is a different, stronger level than coincidental cohesion, where elements are grouped for no meaningful reason at all.
Cohesion is a property of the tasks grouped in a module, not of temporary or local variables, so those descriptions do not define it.
Hence, the answer is Cohesion with respect to time.
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