For a small, local, non profit English language newsletter, we regulary have freelance reporters sending in articles.
Most of these are written in poor English, and need to be transformed/edited into impeccable and nice readable UK English in newspaper style.
Articles will vary in size, but generally have less than 500 words.
The format and readability of the articles is the most important thing, for some articles you'll have to do a rewrite rather than bare editing. Nothing too technical, focus on easy reading.
You can bid on a 1 (one) article base if you like. In general there will be 20-50 articles to do per month.
Now and then there will be some ghostwriting requests also.