/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		int[] arr= {1,1,2,2,2,2,3,3,3,4,4,4,5,5};
		int x = 2;
		System.out.println("Frequency of element "+x+" in an array "+ freqOfElement(arr,x));
	}
	public static int freqOfElement(int[] arr, int x){
		HashMap<Integer,Integer> map = new HashMap<>();
		for(int i=0;i<arr.length;i++){
			map.put(arr[i] ,map.getOrDefault(arr[i],0)+1);
		}
		return map.get(x);
	}
}

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