It is a well-known fact that the frequency of cyclones is 3
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/importance-upper-ocean-heat-content-intensification-and-translation-speed-cyclones
[2] http://admin.indiaenvironmentportal.org.in/category/author/y-sadhuram
[3] http://admin.indiaenvironmentportal.org.in/category/author/k-maneesha
[4] http://admin.indiaenvironmentportal.org.in/category/author/t-v-ramana-murty
[5] http://admin.indiaenvironmentportal.org.in/category/journal/current-science
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-and-ozone-layer
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cyclones
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bay-bengal
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/storms
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change