timeline (noun)
A view on a calendar that displays items such as meetings and events from left to right on a time scale and that can incorporate items from multiple calendars.

timescale (noun)
The time period indicator at the top of the Gantt views, the Resource Graph view, the Task Usage view, and the Resource Usage view. You can customize it to show up to three tiers that can display various time units: top, middle, and bottom.

шкала времени

временная шкала