Lack of explanation of error for visit

[nus-se-bot]

Although this is covered in the UG, it would be more effective if the error message given when entering an incorrect command such as visit. For instance, letting the user know what are the valid frequency parameters in the app and that frequency and occurrence must be both included.

---

_{[original: nus-cs2103-AY2122S1/pe-interim#5829] [original labels: severity.VeryLow type.DocumentationBug]}

[luayida99]

Team's Response

The details are mentioned in the user guide, please read carefully.

Duplicate status (if any):

--