How often do El Niño and La Niña typically occur?

El Niño and La Niña episodes typically occur every 3 to 5 years. However, in the historical record this interval has varied from 2 to 7 years. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.