Similar word to seldom:
a few times, every now and then, from time to time, hardly, hardly ever, in a few cases, inhabitually, irregularly, little, not often, not very often, occasionally, on and off, once in a blue moon, once in a while, rarely, scarcely, scarcely ever, semioccasionally, sometimes, sporadically, uncommonly, unoften, unusually, whimsically
a few times, every now and then, from time to time, hardly, hardly ever, in a few cases, inhabitually, irregularly, little, not often, not very often, occasionally, on and off, once in a blue moon, once in a while, rarely, scarcely, scarcely ever, semioccasionally, sometimes, sporadically, uncommonly, unoften, unusually, whimsically
