Health
What is Sleep duration?
Total time spent asleep in a sleep period, usually aggregated nightly.
Learn this term every day on iPhone.
One hand-written term. A real workplace example. Thirty seconds before your day gets loud.
In real work
Sleep duration below your usual baseline can affect energy and focus the next day.
How is this different from Googling it?
Google gives a definition. Prompthaus pairs each term with how it shows up in standups, PRs, prompts, and design reviews—then quizzes you until the word sticks. One term a day on iPhone.