frequent       
 adjective uk/ˈfriː.kwənt/ us/ˈfriː.kwənt/
B1 频繁发生的;常见的
happening often
  a frequent visitor to the US 经常去美国的人 
 A frequent criticism of the proposal has been its high cost. 人们频繁指责这项提案的成本过高。 
 The most frequent cause of death is heart disease. 最常见的死因是心脏病发作。 
 The attacks were increasingly frequent and serious. 攻击变得越来越频繁,越来越猛烈。 
 Opposite: infrequent
 - More examples
 - There are frequent sailings from Dover.
 - The two countries have had frequent border disputes.
 - All hi-tech weaponry demands frequent servicing to ensure accuracy.
 - Car crashes are so frequent that they don't rate a mention in the newspaper unless a lot of people are killed.
 - He is a frequent flyer.
 
frequent       
verb [ T ]  formal uk/frɪˈkwent/ us/friːˈkwent/
 常去,常到
to be in or visit a particular place often
  a bar frequented by criminals 犯罪分子经常光顾的酒吧