chronologist
/krɒnˈɒlədʒɪst/Definitions
1. noun
A person who studies or records the chronology of events or dates
“The team of historians were joined by a skilled chronologist to verify the timeline of the historical event.”
2. noun
A writer or compiler of a chronological record or history, especially one that covers a long period of time
“The renowned chronologist spent years researching and writing a comprehensive history of the ancient civilization.”