The lackluster battle was punctuated by sporadic mortar fire.
His aim was sporadic and the bullet holes were scattered randomly.
to be sporadic and without pattern to be sporadic and without pattern
Shopping without a list may only fulfill sporadic needs. My sporadic shopping helps me to buy in bulk.
We huddled in our trenches, listening to sporadic enemy gunfire.
sporadically
Sporadic means not occurring every time - it's a once-in-a-while change.
sporadically
He came in at 12:00am and said where are my students?
No, "sporadic" is not a preposition. It is an adjective that describes something occurring at irregular intervals or scattered in various locations.
Whatever I say it is
sporadic!