Question: On what occasions do you say 'thank you'?
Analysis

1.You can list various situations or occasions when you express gratitude by saying 'thank you'. 2.Explain the importance of expressing gratitude in different contexts, such as showing appreciation, politeness, or acknowledging help.

Synonyms
Try these synonyms instead of repeating the question:
  1. occasions→instances; situations; events
  2. say→express; convey