This is the 737th most frequent French word.
vingtaine
A group or quantity of about twenty.
Here, "vingtaine" is used to approximate the quantity, implying around twenty people, showing its use as a rounded estimation.
Il y avait une vingtaine de personnes à la fête.
There were about twenty people at the party.
The term "vingtaine" estimates a duration of around twenty minutes, illustrating its use for measuring time spans.
Une vingtaine de minutes suffiront pour terminer ce projet.
About twenty minutes will be sufficient to finish this project.
In this sentence, "vingtaine" refers to an age range, specifically the twenties, demonstrating its common use for age approximation.