たま偶tamaにni
1.
Describes an event or action that happens infrequently or sporadically, suggesting it occurs from time to time without a regular pattern.
2.
Indicates a rare occurrence, often implying an element of surprise or unexpectedness when it does happen.
3.
Refers to a situation where something is done only sometimes, often to break the monotony of routine or as a special exception.
Example:
たまには会いに来て下さい。