It took my about a month, but I have only around 7 to 8 hrs of "hobby time" per week.
There is an Anna (http://sabi996.deviantart.com/art/Anna-and-Elsa-Frozen-Papercraft-445273373), but it is no longer available for free and she is not the correct size for the Elsa I build. The Elsa in the picture is a different model from mine.