Denshi Jisho — Online Japanese dictionary

多発 たはつ repeated occurrence
Common word, Noun, Suru verb, No-adjective 
多発 たはつき multi-engine aeroplane; multi-engine airplane
Noun 
多発 たはつせい multiple; poly-
Noun 
多発性硬化症 たはつせいこうかしょう multiple sclerosis; MS
Noun 

You can also

Look up kanji details for 多発.

Try a Yahoo Jisho search for 多発 .
Try a Goo Jisho search for 多発 .
Try a Google search for 多発 .