The meaning of Sporadicity and additional information.

Sporades(n. pl.) Stars not included in any constellation; -- called also informed, or unformed, stars.

Sporadic(a.) Occuring singly, or apart from other things of the same kind, or in scattered instances; separate; single; as, a sporadic fireball; a sporadic case of disease; a sporadic example of a flower.

Sporadical(a.) Sporadic.