using System;

using System.Linq;

using System.Linq.Expressions;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        var text = "sometextsometextsometextthatiswritten in a place some text lorem ipsum";

        // Char Count

        var charCount = text.Count(c=> c == 's');

        // Regex Count

        var pattern = new Regex(@"some");

        var result = pattern.Matches(text);

        Console.WriteLine("total char count of 's' "+charCount);

        Console.WriteLine("total char count of 'some' "+ result.Count);

    }

}