Strong’s Greek
G5148 — trietia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
τριετία
trietia — pronounced tree-et-ee'-ah
from a compound of 5140 and 2094; a three years' period (triennium):--space of three years. see GREEK for 5140 see GREEK for 2094
1 occurrence in the KJV.
Acts 20:31
Therefore watch, and remember, that by the space of three years I ceased not to warn every one night and day with tears.