Derailments actually occur in relatively large numbers than what is reported widely. Especially good train derailment which doesnot get that much attention despite disrupting the passenger train's traffic. e.g. This week on Monday, there was a goods train derailment between Jajpur Keonjhar Road-Cuttack. I saw it myself being onbaord Falaknuma Express that got delayed by 2.5 hr as a result. But didnot hear it on popular news.