Frequent【adj.】

1. happening or doing something often频繁的，经常的

He is a frequent visitor to the museum.

他是博物馆的常客。

2. common or usual常见的，通常的

This is a frequent mistake among beginners.

这是初学者常犯的错误。

• frequent user

someone who uses something often频繁使用者

--> frequent【verb】

1. to visit a particular place often常去(某地)

She frequents that café because she loves their coffee.

她经常去那家咖啡馆，因为她喜欢他们的咖啡。

2. to associate with someone often常与(某人)交往

He frequents artists and writers in the city.

他经常与城里的艺术家和作家交往。

--> frequently【adv.】

at frequent intervals; often频繁地；经常地

He frequently visits his grandparents on weekends.

他周末经常去看望他的祖父母。

--> frequency【noun】

the rate at which something happens or is repeated发生率；出现率；重复率

The frequency of accidents on that road has increased.

那条路上的事故发生率增加了。