Top Calls is a simple tool that helps you track the top contacts in your phone based on your incoming and outgoing calls. View a graph of the top 10 calls or a summary list containing all your calls history and logs.
You can sort the entries or export the statistics to your SD card using menu functions in the summary list. You can also disable a particular contact (your office perhaps?) so that it will not be ranked. Install Top Calls Widget to make phone calls to your top 3 contacts with a single touch.
Top Calls is available for free with ads.