The most frequently used method is radiocarbon dating.

最常用的方法是放射性碳定年法。

The group have frequently used bully-boy tactics.

那个团伙常常耍流氓。

Frequently used is the key here.

这里的关键是常用。

The Naming service is a frequently used service in CORBA.

CORBA中经常使用命名服务。

The number of occurrences of frequently used column values.

经常使用的列值的出现次数。