HSK C3/W3
Correct

纪

/ jǐ / 
Strokes

Definition

order/discipline/age/era/period/to chronicle

Example

As a Noun
discipline
1
Jiàojǐ
校纪

school discipline

As a Noun
age; epoch
As a Noun
period
Definition
［especially used in words like纪年，纪要，纪传，etc］