This is the 343rd most frequent Korean word.
작년
"Last year."
Here, '작년' (last year) indicates the time period when the action happened.
작년에 친구들과 여행을 갔어요.
Last year, I went on a trip with friends.
In this sentence, '작년' (last year) is used as a comparative reference to this year.
올해는 작년보다 조금 바빴어요.
This year has been a bit busier than last year.
The term '작년' (last year) is used to recollect a specific event during a similar time period in the past.