pre-prepared article; draft article
Refers to an article or manuscript prepared in advance, often for use when the writer is unavailable or for scheduled publication.
記者は休暇中に予定稿をいくつか用意した。
The reporter prepared several pre-written articles during the vacation.
Compound of 予定 (schedule, plan) and 稿 (manuscript, draft). The exact historical derivation is uncertain, but the word is transparently formed from these components.