It depends on several factors such as the quality and complexity of the article, the proficiency of the editor, and the editing process used. For example, if the article is written well and requires minimal changes, an editor with basic knowledge should be able to edit it in about an hour. But if the article is complex and requires a substantial amount of work, then it could take anywhere from three to six hours.
Additionally, the type of editing process employed can also influence the time it takes to edit an article. For example, a light edit will take less time than a full edit. A light edit typically consists of grammar and spelling corrections, while a full edit includes more comprehensive aspects such as improving clarity, adding transitions, and restructuring sentences.
Overall, it could take anywhere from an hour to six hours or more to edit a 1000 word article. Depending on the article and the editing process used, the time to edit it can significantly differ.