sporadic

(adv. sporadically)not regular or frequent ซึ่งเกิดขึ้นนานๆ ครั้ง, ที่เกิดขึ้นเป็นพักๆ

Jobs worked sporadically as an electronics technician at video game maker Atari Inc., traveled to India and found guidance from a Zen Buddhist master.

NTC fighters held the line on the eastern outskirts of the city amid some sporadic artillery shelling and gunfire from Gadhafi forces.

For months, the government refused to place a wider ban on farm produce from the Fukushima region despite sporadic discoveries of contaminated produce.