private void btnShowFrequencyDictionaryForOutputText_Click(object sender, EventArgs e)
 {
     new FrequentDictForm(FrequentCounter.countAppearencesOfLetter(outputTextBox.Text)).Show();
 }
        private void btnShowFreqDict_Click(object sender, EventArgs e)
        {
            var dict = FrequentCounter.countAppearencesOfLetter(outputTextBox.Text);

            new FreqDictForm(dict.OrderByDescending(x => x.Value).Select(x => x.Value).ToArray()).ShowDialog(this);
        }