seldom

seldom
/ˈseldəm; `sɛldəm/ adv
not often; rarely 不常; 罕见; 难得
    I have seldom seen such brutality. 我很少见到这种暴行.
    We seldom go out. 我们不常出门.
    We go out very seldom. 我们绝少外出.
    The island is seldom, if ever, visited by ships. 这个岛难得有船停靠.

牛津英汉双解词典