in·fre·quent 
(ĭn-frēkwənt)
(ĭn-frēkwənt)adj.
1. Not occurring regularly; occasional or rare: an infrequent guest.
2. Situated or placed at rather wide intervals, as in time or space: infrequent oases in the desert.
in·frequence, in·frequen·cy n.
in·frequent·ly adv.