rarity
noun [ C or U ] uk/ˈreə.rə.ti/ us/ˈrer.ə.t̬i/
C1 罕见的东西（或人）；稀有，罕见
something that is very unusual, or the quality of being very unusual
Men who do the cooking are something of a rarity. 做饭的男人还真是少见。
Diamonds are valuable because of their rarity. 钻石贵重是因为它很稀有。