I have created a file about using Antconc, a concordancing program by Laurence Anthony at Waseda University. You can find it here. The latest version was created on 5 March 2011.
Manually type or paste some text into the main window and save.
Saving from a word processor like Microsoft Word may not give a “clean” output, that is, some of the letters or punctuation may not render as plain text. This may affect the count and/or searchability of the resulting text.