We use during + noun to say when something happens. We don’t write a period of time with it.

During my holiday I met a nice bull.
• He fell asleep during three hours. WRONG
• He fell asleep during the presentation. CORRECT
• During the winter we get a lot of snow. CORRECT
Remember: No time period with during.
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Remember: No time period with during.
During take off I get frightened.
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Remember: No time period with during.
During a visit to a church many funny things can happen.
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For, During or While?
During no time period. While two actions. For with time period. (3:15)Vocabulary Video Lesson: The Zodiac
This vocabulary lesson will help you define Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces. (8:00)