This is the 1499th most frequent French word.
dizaine
A group or set of ten.
Here, 'dizaine' is used to approximate a quantity, indicating around ten people.
Il y avait une dizaine de personnes à la fête.
There were about ten people at the party.
In this sentence, 'dizaine' signifies a period of approximately ten years, often used in reflective contexts.
Une dizaine d'années se sont écoulées depuis cet événement.
About ten years have passed since this event.
The term 'dizaine' here implies an estimate of the quantity of items in her collection.