休憩 and 休暇: a break during work and a period of leave
Compare a break within an activity with leave from work, without treating one person's leave as closure of an entire facility.
Resting within an activity
休憩, read きゅうけい, means pausing an activity to rest. 昼の休憩は十二時からです。 announces that the lunch break starts at twelve.
休憩が終わったので、売り場に戻りました。 says that the person returned to the sales floor because the break had ended. Read the rest period and return to work together.
Leave from work or study
休暇, read きゅうか, means leave from work or study. 夏に一週間の休暇を取る予定です。 says that a week of leave is planned for the summer.
休暇の日程を同僚に伝えました。 says that the leave schedule was communicated to colleagues. It reports sharing the schedule, not already taking the leave.
Separating the person from the operating service
担当者は休暇中ですが、窓口は開いています。 says that the person responsible is on leave, but the counter is open. An individual's leave and an institution's operating status can differ.
ただいま休憩中です。 indicates that a break is currently in progress. The notice alone does not tell you the return time, so check separate information if you need it.
Is the counter also closed in 担当者は休暇中ですが、窓口は開いています。?
Show the answer and why
No. The person responsible is on leave, but the counter is explicitly stated to be open.