This is the 2224th most frequent Japanese word.
経ち
"経ち" means "the passage of time" or "elapsed time."
The word '経ち' is used to convey the passage of time referring to '時間' (time).
時間が経ちました。
Time has passed.
Here, '経ち' expresses the elapsed period of several years after an event.'
それから数年が経ちました。
Several years have passed since then.
In this sentence, '経ち' indicates the duration of fifty years passing since a specific historical point.