【求助】vb.asp.net如何计算文本框2中所输入字符在文本框1中所出现的次数

Protected Sub btnSearch_Click(sender As Object, e As System.EventArgs) Handles btnSearch.Click

        lblResult.Text = "Number of times the words in Phrase 2 textbox has been used in Phrase 1 textbox: <br><br>"
        Dim i As Integer
        Dim phraseArray2 As String() = tbPhrase2.Text.Split(" "c)

        For i = 0 To phraseArray2.Length - 1

            lblResult.Text &= phraseArray2(i) & ": " & appears(phraseArray2(i)) & " time(s)<br>"

        Next

End Sub

Protected Function appears(ByVal String_To_Search_For As String) As String