Question: On what occasions do people have to wait for a long time?
Analysis

Question: In what situations do people need to wait for a long time? Analysis: When answering, you should list some scenarios and describe various situations where people may experience long waits. You can mention that people may experience long waits in hospital waiting rooms, especially in emergency rooms or busy medical facilities. At transportation hubs like airports and train stations, people may also need to wait for a long time due to delays and cancellations. People may also queue for a long time at busy restaurants or the entrances of special events (such as concerts or sports events). For example, in daily life, people may also encounter long waits at places like banks, government offices, and customer service centers.

Synonyms
Try these synonyms instead of repeating the question:
  1. on what occasionswhen