Notes:

We use "多" to express approximate amounts:

五千多 over five thousand dollars

If there is no measure word, we add “多” after the quantity:

一年多 ✅

If there is a measure word, we use the construction # + measure word + 多 + noun:

一个多月，一个多星期，一个多小时 ✅

一个月多，一个星期多，一个小时多 ❌

Except：

一天多，一分钟多 ❌

一两天，一分多钟 ✅