This is the 5218th most frequent Chinese word.
上個
"上個" means "last" or "previous."
In this sentence, '上個' is used to specify the timing, referring to the 'previous' or 'last' weekend.
上個週末我去了海邊玩。
Last weekend, I went to the beach to play.
Here, '上個' indicates sequence or order, referring to the 'previous' bus ride or timing.
上個班次的車已經發車了,我們需要等下一班。
The previous bus departure has already left; we need to wait for the next one.
In this example, '上個' refers to the 'last century' in terms of historical period.