infrequent

adjectives

not frequent; not occurring regularly or at short intervals
"infrequent outbursts of temper"
is derived from
antonym
is similar to
occurring from time to time
"took an occasional glass of wine"
is similar to
recurring only at long intervals
"a rare appearance"; "total eclipses are rare events"
see also
recurring in scattered and irregular or unpredictable instances
"a city subjected to sporadic bombing raids"