#include <iostream>
#include <vector>
using namespace std;

class Frequency {
public:
    int getFrequency(vector<string>& article, int n, string word) {
        int count = 0;
        for (int i = 0; i < n; ++i) {
        if (article[i]==word) {
                count++;
            }
        }
        return count;
    }   
};