Print frequencies of individual words in a string code example

Example: Print frequencies of individual words in a string

void printFrequency(string str)
{
    map<string, int> FW;
    stringstream s(str); 
    string Word; 
    while (s >> Word)
        FW[Word]++;
    for (auto m : FW)
        cout << m.first << " -> " << m.second << "\n";
}
    // Input: One Two Three One Three 
  	// Output One -> 2
    //        Three -> 2
    //        Two -> 1