συνήθεια G4914
synḗtheia · soon-ay'-thi-ah · Noun Feminine
from a compound of σύν and ἦθος; mutual habituation, i.e. usage:--custom.
2 Occurrences in the King James Bible
John 18:39But ye have a custom, that I should release unto you one at the passover: will ye therefore that I release unto you the King of the Jews?
1 Corinthians 11:16But if any man seem to be contentious, we have no such custom, neither the churches of God.