A more thorough explanation:

Definition: A bishopric is a diocese or the office of a bishop.

Examples:

• The bishopric of Rome is also known as the Diocese of Rome.
• He was appointed to the bishopric of the local church.

The first example illustrates the use of bishopric as a diocese, as Rome is a geographical area that is overseen by a bishop. The second example illustrates the use of bishopric as the office or position of a bishop, as someone was appointed to the role of bishop in a specific church.