From JoyceUlysses.txt -- words occurring exactly once

Given a text file of a novel (JoyceUlysses.txt) ...
could someone give me a pretty fast (and simple) Python program that'd give me a list of all words occurring exactly once?
               -- Also, a list of words occurring once, twice or 3 times
re: hyphenated words        (you can treat it anyway you like)
        but ideally, i'd treat  [editor-in-chief]
                                [go-ahead]  [pen-knife]
                                [know-how]  [far-fetched] ...
        as one unit.