"90 minutes" refers to a duration of time equivalent to one and a half hours. It is commonly used in various contexts, such as sports, where many games, including soccer and basketball, have time limits that can be measured in minutes. In everyday life, 90 minutes can represent a typical length for activities like watching a movie or attending a class. This time frame is often considered manageable for maintaining focus and engagement, making it a popular choice for scheduling events and activities.