adv.稀少地,珍贵地;
例句:
Not infrequently he was termed Hurry Skurry.
有时他被称为哈利·霹雳.
For infrequently used items pack them long before moving.
不用的东西,早在搬家前就可先打包.
A bad headlines is which infrequently a answer is no.
坏消息是上帝的答案有时是否定的.