This is the 55th most frequent Chinese word.
时
"时" means "time" or "hour" and can also signify "season" or "occasion."
Here, '时' is used to indicate a specific moment or period of time during which an action occurs.
我在上学时喜欢听音乐。
I liked listening to music while I was in school.
In this sentence, '时' refers to a specific point in the past.
那时，我们正在讨论一个重要的问题。
At that time, we were discussing an important issue.
'时光' means time, and in this phrase, '时' forms part of a compound word referring to periods or moments in time.