AC 10209 - 'Once a Year'

AC 10209

'Once a year' means everlastingly.
This is clear from the meaning of 'once a year'
as for the whole year;
for the expiation on the horns of the altar of incense
once a year implied expiation for the whole year.
'A year', like all references to time,
means a state and its duration, and also everlastingness.
In this instance it is a state of purification from evils
by means of the truths of faith;
for this state is meant by expiation
on the horns of the altar of incense once a year,
and all purification from evils,
which is regeneration,
persists everlastingly
not only in the world but also in the next life. 

(expiation - the act of making amends
or reparation for guilt or wrongdoing, atonement.)