动名词是动词，可以有宾语，被副词修饰。所以，

Frequent reading books is important. 错误

Reading books requently is a good habit. 正确

名词化的动名词不同于普通所说的动名词。名词化的动名词用如名词，即须用限定词、被形容词修饰，不能接宾语，宾语由介词of引出（of介词短语为定语，或者宾语置于doing前作定语，构成合成名词）。例如：

Frequent book reading is important.

That is a meaningless wasting of time.

比较：I hate wasting time meaninglessly.