1
subject + verb + infrequently
They meet infrequently.
他们很少见面。
不常；很少
先理解核心含义，再看它在真实句子里的用法。
不常；很少
Not frequently; rarely.
They meet infrequently.
他们很少见面。
不经常地,不频繁地
Not frequently.
She infrequently visits her hometown because she is busy with work.
她因为工作繁忙，很少回老家。
The train runs infrequently on weekends, so check the schedule.
这趟火车周末运行不频繁，所以请查看时刻表。
He infrequently eats dessert, preferring savory foods.
他很少吃甜点，更喜欢咸味食物。
They meet infrequently.
他们很少见面。
置于句首表示强调
Infrequently, she calls her parents.
她不常给父母打电话。
This word is infrequently used.
这个词很少被使用。
Not this
I go to the cinema infrequent.
Use this
I go to the cinema infrequently.
错误将副词'infrequently'误用为形容词'infrequent'。副词应修饰动词'go'。
Not this
He infrequently doesn't eat breakfast.
Use this
He doesn't often eat breakfast.
错误将'infrequently'与否定词连用造成双重否定，导致逻辑混乱。应使用'doesn't often'表达相同含义。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
经常；并不罕见
Not infrequently, the train arrives late.
火车晚点的情况并不少见。
只是偶尔地；很少
She only infrequently checks her email.
她很少查看电子邮件。
很少发生；不常出现
Accidents occur infrequently on this road.
这条路上很少发生事故。
很少被使用
This function is used infrequently by most users.
大多数用户很少使用这个功能。
相对较少地；相对不频繁地
He travels abroad relatively infrequently.
他出国的次数相对较少。
经常；并不少见地
Not infrequently, the best ideas come from unexpected sources.
最好的想法常常来自意想不到的地方。
太不经常；远远不够频繁
They visit their grandparents all too infrequently.
他们看望祖父母的次数太少了。
只是偶尔；很少
She only infrequently checks her email after work.
她下班后很少查看电子邮件。
Use infrequently naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 frequently（频繁地）前加否定前缀 in-，变成“不频繁”，即“很少、不常”。
语域：formal 常见场景：正式写作、学术文章 infrequently 通常用于正式写作或学术语境，比较正式；日常口语中更常使用 rarely 或 not often 来表达相同的含义。
频率副词，通常置于主要动词前
Dictionary facts from ECDICT, WIKTIONARY.