Sometime :: Sometime (adv.) At a past time indefinitely referred to; once; formerly.
Sometime :: Sometime (adv.) At a time undefined; once in a while; now and then; sometimes.
Sometime :: Sometime (adv.) At one time or other hereafter; as, I will do it sometime..
Sometime :: Sometime (a.) Having been formerly; former; late; whilom.
Sometimes :: Sometimes (adv.) At times; at intervals; now and then;occasionally.