occasioal(ly)

1) Lucy is especially good at traditional Chinese landscape painting, but occasionally she does oils too.

2) 例子: I usually have dinner in resaurants and occasionally at home. 

    场景: 最近几乎每天吃兰州拉面。

3) formidable很难对付的(对手)

4) I am well travelled.(我去过不少地方)

    traveled(US) or travelled(UK)

occasioal(ly)