There is no one answer to this question, as the frequency of newsletters depends on a variety of factors, including the size and scope of the author’s writing project, the type of audience the author is Targeting, and the frequency with which readers engage with the author’s content.
Generally speaking, however, an author should send a newsletter every few months, or as needed to keep readers updated on new content and to solicit feedback. Depending on how frequently readers engage with the author’s content, occasional newsletters may be sufficient, while more frequent newsletters may be necessary if readers are not engaging with the author’s content regularly.
Ultimately, it is important for authors to consider their audience and their writing project before determining how often they should send a newsletter. However, sending newsletters regularly can help authors keep their readers informed and engaged with their work.