C # A method of counting word frequency through regular expressions

<summary>
Gets the number of occurrences of the specified string in the source string
</summary>
<param name= "str" ></param>
<param name= "Sourcestr" ></param>
<returns></returns>
static int Getstrappeartimes (String str, string sourcestr)
{
Regex regex = new Regex (str, regexoptions.ignorecase);
var mymatch=regex. Matches (SOURCESTR);
Return Mymatch. Count;
}

C # A method of counting word frequency through regular expressions