How great was the sorrow of the Messenger of Allah, peace and blessings be upon him, after the death of his uncle and his wife, and how long did it last?

Abu Talib, the uncle of the Prophet, peace and blessings be upon him, and his wife Khadijah, may Allah be pleased with her, passed away in the same year, which was called the Year of Sorrow, due due to the intense grief of the Prophet, peace and blessings be upon him, over the loss of their support and solace. Abu Talib used to protect and support him, and Khadijah used to reassure and comfort him. Grief is the opposite of joy, and no specific duration was determined for his sorrow, peace and blessings be upon him, over them.