Strong’s Greek
G2120 — eukairia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
εὐκαιρία
eukairia — pronounced yoo-kahee-ree'-ah
from 2121; a favorable occasion:--opportunity. see GREEK for 2121
2 occurrences in the KJV.
Matthew 26:16
And from that time he sought opportunity to betray him.
Luke 22:6
And he promised, and sought opportunity to betray him unto them in the absence of the multitude.