Refers to a specific block or range of time within a day, schedule, or program. Often used for appointments, TV slots, or designated time windows.
I scheduled the meeting for an afternoon time slot.
This program airs during the late-night time slot.
time zone
Used for geographical time zones, though タイムゾーン is also common. Often appears in contexts like international scheduling or travel.
The time zones of Japan and the UK are very different.
It's better to avoid calling during this time slot.
Train congestion varies depending on the time of day.
Evening is the busiest time of day.