Given the task definition and input, reply with output. In this task, you're given passages that contain mentions of a time duration related quesry and we are supposed to write answer to a question that involves event “frequency", which refers to how often an event is likely to be repeated. For example, "taking showers" typically occurs ~5 times a week, "going to saturday market" usually happens every few weeks/months, etc. 
 Note that a lot of the questions could have more than one correct answers. We only need a single most-likely answer. Please try to keep your "answer" as simple as possible. Concise and simple "answer" is preferred over those complex and verbose ones.  

Sentence: Specialized comics periodicals formats vary greatly in different cultures. Comic books, primarily an American format, are thin periodicals usually published in colour. European and Japanese comics are frequently serialized in magazines—monthly or weekly in Europe, and usually black-and-white and weekly in Japan. Japanese comics magazine typically run to hundreds of pages. 
Question: How often do serialized comics typically appear in Japanese magazines?

weekly