This is the 142nd most frequent French word.
période
A length or portion of time.
In this sentence, 'période' refers to a span of time specifically defined by its context, which is the examination time.
La période des examens est toujours stressante.
The exam period is always stressful.
Here, 'période' is used metaphorically to describe a phase characterized by emotional or circumstantial conditions.
Elle traverse une période difficile dans sa vie.
She is going through a difficult period in her life.
'Période' in this context denotes a specific epoch or timeframe in historical studies.