Possible Clues:

• Break identifiers
• Items in many lists
• Causes of pauses
• See 21
• First madman in state of unconsciousness taken to school for punctual types
• They stop one's flow for punctual types
• Causes for pauses
• Type of butterflies? Take a couple of breaths in the passage!
• Characters in 'Eat, Pray, Love'?
• Marks in a list