Sporadic

My connection has sporadic problems.

Apart from hearing sporadic gunfire, the day was pretty quiet.

Sporadic gunfire was heard in the distance.

Sami's movements were sporadic.

Sporadic rebel campaigns continued throughout 2006 and 2007.

It was a stodgy, weary display from Mourinho’s team with only sporadic moments when they threatened Salvatore Sirigu’s goal and their manager seemed bewildered afterwards when he tried to explain what had gone wrong.