occasional

积累表达：

Although I am well traveled, I have mostly well visited different parts of my own country and have made only occasional overseas countries. 

场景：很多人平时很少看医生，所以不能早期发现疾病。

例子：Many people only see a doctor occasionally so they can't  be diagnosed at an early stage.

翻译：

Lucy is good at Chinese landscape painting, though she does oil painting occasionally.