Other forms: visitations
Use the noun visitation to describe a formal or official visit, like the city health inspector's yearly visitation to your favorite pizza place.
A visitation often includes some kind of evaluation or inspection, or has some other formal aspect. Meeting with a prisoner might be described as a visitation, and the official scheduled time that divorced parents have with their children are also a kind of visitation. Another meaning of the word is "calamity," or "disaster," especially one of Biblical, plague-like proportions: "The town faced a visitation of unbearably hot temperatures for three weeks."