If such a feature existed, it would be part of a GUI, not the core Asterisk. Although one could, in theory, maintain the counts, it would involve significant amounts of custom coding. If you can get the counts into global variables, defining extensions that read them out would be fairly simple application of the SayNumber application. Getting them into the variables would be where all the work was.
Whilst the CDR files contain raw data for such a calculation, you would need to provide code to summarise it, and you should note that CDRs cannot handle complex calls well.