**6. Frequency analysis**

The magnitude of an extreme event has an inverse relation with its frequency. In other words, the higher magnitude is the event, the less is its frequency of occurrence. The primary objec‐ tive of frequency analysis is to relate the magnitude of extreme events to their frequency of occurrence through application of probability distributions (Chow et al., 1988). The first assumption in this manner is that under study data are independent and identically distribut‐ ed and their underlying system is random and is spatially and temporally independent. This would be available when there is no correlation between observations. In application, these conditionscanbeachievedbyusingannualmaximumvaluesnotingtheindependencyofevents between years. However, the wind speed parameter has been rarely examined by this method among other meteorological parameters; therefore, the studies in this field are at the beginning.
