presidency
US /ˈprez.ɪ.dən.si/
UK /ˈprez.ɪ.dən.si/

1.
the office of president
:
•
He is running for the presidency.
•
The presidency comes with great responsibilities.
2.
the period during which a president is in office
:
•
During his presidency, many reforms were implemented.
•
The country prospered greatly under her presidency.