时序

Traditional form:

時序

Pinyin (reading):

shíxù

Definitions:

• timing (of a signal or sequence)
• time course

Characters:

• 时 - time, season; period, era, age
• 序 - order, sequence, series; preface

Traditional characters:

• 時 - time, season; period, era, age
• 序 - order, sequence, series; preface