Strong’s Greek
G2122 — eukairos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
εὐκαίρως
eukairos — pronounced yoo-kah'-ee-roce
adverb from 2121; opportunely:--conveniently, in season. see GREEK for 2121
2 occurrences in the KJV.
Mark 14:11
And when they heard it, they were glad, and promised to give him money. And he sought how he might conveniently betray him.
2 Timothy 4:2
Preach the word; be instant in season, out of season; reprove, rebuke, exhort with all longsuffering and doctrine.