An hourglass with sand flowing through it. 

Hourglass

A sand clock or hourglass for keeping time.

Sand Clock Or Hourglass

An hourglass icon with sand in the bottom.

Abstract landscape with clouds, mountains or pyramids, and sand dunes or uneven ground.

A busy and overworked manager or employee surrounded by charts, graphs, and notifications.

An hourglass with sand pouring inside the container.