A count of people meaning five people (used daily to indicate the number in a group).
パーティーには五人来る予定だ。
Five people are expected to come to the party.
クラスで五人ずつグループを作った。
We formed groups of five in the class.
彼の家族は父・母と子ども三人で五人家族だ。
His family has five members: father, mother, and three children.