频繁的用英语可以用 "frequent" 来表示。这个词是由拉丁语 "frequens" 演变而来，意思是 "常出现的" 或 "经常的"。

例句：

She makes frequent trips to the pbrary to borrow books. (她经常去图书馆借书。)
The frequent interruptions made it difficult for me to concentrate. (频繁的打断使我很难集中注意力。)
He has a frequent headache because of his high blood pressure. (由于他的高血压，他经常头痛。)