sporadically
adv.happening at irregular times or in a way that is not continuous. You use this when something occurs now and then but not often.
adv.occurring at irregular intervals or in an intermittent manner. Often describes events that are not part of a regular pattern.
“The rain fell sporadically throughout the afternoon.”
“The company reported sporadically high sales during the holiday season, though the overall trend remained flat.”
“While the conflict has been sporadically active for decades, the recent ceasefire has brought a much-needed period of stability to the region.”
“Maus was initially serialised as an insert in Raw – new issues came out sporadically, whenever Spiegelman had finished a chapter.”
“It’s sporadically very funny, but the tone of this blackly comic murder-mystery is all over the place.”
From sporadic + -ally.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.