unfrequent

例句：

1. 1.The movie was unfrequently shown at the cinema.
   这部电影在电影院里很少放映。
2. 2. She's an unfrequent visitor to our city.
   她是我们城市的不常客。
3. 3. The book is unfrequently published by this publisher.
   这本书由这家出版社不经常出版。