频繁 + 的 + Noun
The adjective 频繁 (pínfán) means "frequent" and describes actions or events that happen often or repeatedly. It is typically used before 的 to modify a noun, as in 频繁的军事行动 (frequent military operations). It can also appear after a subject as a predicate, as in 袭击很频繁 (attacks are frequent).
最近这条路上交通事故非常频繁。
zuìjìn zhè tiáo lù shàng jiāotōng shìgù fēicháng pínfán.
Traffic accidents have been very frequent on this road recently.
他频繁出差,几乎每周都要飞一次。
tā pínfán chūchāi, jīhū měi zhōu dōu yào fēi yí cì.
He travels for business so frequently that he has to fly almost every week.
频繁的加班让她的身体越来越差。
pínfán de jiābān ràng tā de shēntǐ yuèláiyuè chà.
Frequent overtime has made her health worse and worse.