If you say that there has been ~ of something, you mean that someone has done a task unnecessarily because it has already been done before.
...unnecessary ~ of resources.
N-UNCOUNT
If you say that there has been ~ of something, you mean that someone has done a task unnecessarily because it has already been done before.
...unnecessary ~ of resources.
N-UNCOUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012