availability

新鲜农产品的可用性随季节变化。

The ___availability of fresh produce varies by season.

酒店确认了我们入住日期有空余的双人间。

The hotel confirmed the ___availability of a double room for our dates.

我在网上查了航班的可用性，有很多选择。

I checked the ___availability of flights online and there's plenty of choice.