People often focus on the absence of visits at the highest levels, but those are infrequent in any relationship.

人们常注重于没有最高层访问，但这类访问在任何关系中都并非频繁。

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Although menus are not used as frequently as toolbar controls, they are still used very often, particularly by new or infrequent users.

尽管菜单使用频率不如工具栏控件高，但它仍然是我们经常要用到的，特别是新手或者生疏用户。

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These charming ladies are on hand to help you with your travel needs, anything from directions and security regulations to liquid restrictions and boarding card details -- the kind of things that can often baffle infrequent fliers.

BBC: Airport avatars offer travel advice