This is the 108th most frequent French word.
heures
"Hours."
Here, 'heures' is used to state the time of day by mentioning a specific hour.
J'arrive à l'école à huit heures.
I arrive at school at eight o'clock.
Here, 'heures' indicates a duration or amount of time.
Il a passé trois heures à faire ses devoirs.
He spent three hours doing his homework.
In this sentence, 'heures' refers to a general period of time within the morning.