oneThis plural form is used for numbers like:  1
Expires after %1$d occurrence
otherThis plural form is used for numbers like:  everything else
Expires after %1$d occurrences
%1$d이 일어나고 끝남
Expires after %1$d occurrence
Expires after %1$d occurrences
Expires after %1$d occurrence
Expires after %1$d occurrences
%1$d이 일어나고 끝남
%1$d - total number of occurrences scheduled, %1$d may be skipped for singular if translation looks better.