Strong’s Greek
G2405 — hierateia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἱερατεία
hierateia — pronounced hee-er-at-i'-ah
from 2407; priestliness, i.e. the sacerdotal function:--office of the priesthood, priest's office. see GREEK for 2407
2 occurrences in the KJV.
Luke 1:9
According to the custom of the priest’s office, his lot was to burn incense when he went into the temple of the Lord.
Hebrews 7:5
And verily they that are of the sons of Levi, who receive the office of the priesthood, have a commandment to take tithes of the people according to the law, that is, of their brethren, though they come out of the loins of Abraham: