rain heavily与rain lightly的用法

rain lightly这个用法如何，我们可以查阅英美人是否常用。

查阅语料库CORPUS OF CONTEMPORARY AMERICAN ENGLISH，结果是：rain lightly 5例；rained lightly 1例；raining lightly 11例。

动词+lightly：共17例。如：

It had started to rain lightly.

Outside it began to rain lightly.

It was raining lightly, but the rain did not seem to bother the Mentor.

It was raining lightly, but she'd taken her umbrella down.

It is raining lightly outside.

名词a light rain：共137例。如：

A light rain is falling.

A light rain had begun to tumble down.

The sky is black; there's a light rain falling.

By dawn a light rain fell on campus.

and a light rain came quietly down.

I had an early breakfast and, in spite of a light rain, decided to take a walk.

There was a light rain, leaves shifting overhead

It's a light rain right now, but there's a pretty strong headwind.

A light rain falls on a SMALL FARMHOUSE.

通过查阅语料库，看英美人的实际使用情况，得出如下结论：

rain lightly可以用，但数量较少，远不如a light rain用的多。

此外，同样语料库查阅，rain heavily 4例；rained heavily 8例；raining heavily 17例。动词+heavily：共29例。名词a heavy rain：共68例。