How many years hazrat Umar ruled as caliph?

Hazrat Umar ibn al-Khattab ruled as the second caliph of the Rashidun Caliphate for approximately 10 years, from 634 CE until his assassination in 644 CE. His leadership is noted for significant territorial expansion, administrative reforms, and the establishment of a judicial system. Umar is also recognized for his contributions to the development of Islamic governance and law.