This is the 18056th most frequent Korean word.
수십년
"수십년" means "several decades."
In this sentence, '수십년' refers to a time span of several decades, emphasizing the long duration of the author's activity.
그 작가는 수십년간 소설을 써 왔다.
The author has been writing novels for decades.
Here, '수십년' is used to denote a passing time span of multiple decades, indicating a significant amount of elapsed time.
수십년이 지나도 그 도시의 매력은 변하지 않았다.
Even after decades, the charm of the city has not changed.
The term '수십년' represents a continuous duration of many decades during which the research activity was carried out.