Other forms: newsletters
A newsletter is a short piece of news sent out on a regular schedule to everyone on a list. The school one that comes home crumpled in a bag, the running club's, the email you signed up for once and still get every Thursday.
A newsletter comes from a group to its own people — a company to its staff, a charity to its donors, a writer to her readers — and that is what separates it from a newspaper. Nobody buys a newsletter, and it carries the group's news rather than the world's. It goes out weekly, monthly or quarterly, and the verbs around it are all about the list: you subscribe to a newsletter, you sign up for one, you unsubscribe when you have had enough. Most arrive by email now, though the school still prints its own. Write it as one word — no space, no hyphen.
Shares are an estimate: a language model read 27 sentences found in the wild and placed 27 of them on a sense — a count of our sample, not a measurement of English.
newsletter is a regular publication.
From news + letter.
Etymology from Wiktionary, CC BY-SA