英语语法问题求解。。。谢谢了？

Question

I think that we ate five meals a day.
请问大这个句子里的 a day是一个“频率状语”还是看作是一个“时间状语呢？”表示“每天吃五顿饭”请大家帮忙解答一下谢谢了。

Answer 1

I think we ate five meals a day.
a day相当于every day，是个时间状语。
five miles a day就是频度状语。