What are the times between the three major periods of Egyptian history called?

The three major periods of Egyptian history are the Old Kingdom, Middle Kingdom, and New Kingdom. The times between these periods are referred to as the Intermediate Periods. Specifically, the First Intermediate Period occurs between the Old and Middle Kingdoms, while the Second Intermediate Period falls between the Middle and New Kingdoms. These periods are characterized by political instability, fragmentation, and sometimes foreign invasions.