Here are some examples of periodicals:
* Newspapers: Daily, weekly, or monthly publications that report on current events.
* Magazines: Weekly, monthly, or quarterly publications that cover a variety of topics, including news, entertainment, fashion, and lifestyle.
* Journals: Academic publications that publish original research articles and reviews.
* Trade publications: Periodicals that focus on specific industries or professions.
* Blogs: Regularly updated websites that feature articles, posts, or other content.
The frequency of publication can vary greatly, from daily newspapers to quarterly magazines.