Where do cyclones occurs the most?

You need to specify about clyclones. Majority of tornadoes occur in the US, however they can occur just about anywhere that gets thunderstorms. If you mean tropical cyclones, then they mostly form in the Pacific, Northern Atlantic and to a lesser degree the Indian Ocean. The Pacific has the most area in size that can support tropical development, and can see cyclones form at any time of year. Late summer to fall tends to be the most active timeframe due to low shear from the polar front jet and extentsion of warmer currents further from the equator.