An indictment for theft may include several counts against the same defendant for distinct acts of theft, and the aggregate amount of the thefts shall determine the grade of the offense charged. If a defendant misappropriates money or other things of value, which were entrusted to him by virtue of his office, employment, or any fiduciary relationship, he may be charged in one count with theft of the aggregate amount misappropriated by him during the entire time of his holding the office, employment, or fiduciary relationship.