Sporadic and Unfrequent

Sporadic adjective - Lacking in steadiness or regularity of occurrence.

Unfrequent and sporadic are semantically related in on and off topic. In some cases you can use "Unfrequent" instead an adjective "Sporadic".

Nearby Word: sporadically

Sporadic and unfrequent are semantically related in exceptional topic. You can use "Sporadic" instead an adjective "Unfrequent", if it concerns topics such as hardly any. rare substitute