infrequently
Definitions
Not happening often; rarely.
At irregular or widely spaced intervals.
Examples
Due to his busy schedule, he visits his hometown quite infrequently.
The rare bird is spotted only infrequently by local birdwatchers.
Synonyms
rarely seldom occasionally sporadically scarcely hardly ever once in a blue moon
Antonyms
frequently often regularly constantly habitually repeatedly all the time