Strong's #2121: eukairos (pronounced yoo'-kahee-ros)
from 2095 and 2540; well-timed, i.e. opportune:--convenient, in time of need.
Thayer's Greek Lexicon:
̓́
eukairos
1) seasonable, timely, opportune
Part of Speech: adjective
Relation: from G2095 and G2540
Citing in TDNT: 3:462, 389
Usage:
This word is used 2 times:
Mark 6:21: "And when a convenient day was come, that Herod on his birthday"
Hebrews 4:16: "mercy, and find grace to help in time of need."