facet count

Pivot faceting (also termed as Decision tree faceting) can be defined as tool that let us do certain automated operations such as sorting, computing count, sum and average of the information stored in a table. As a result, it displays the summarized information in another table. If you are looking for the summarized data (similar to statistics) probably for the purpose of data analysis or reporting, use of pivot faceting is the one for you. 

In user perspective, a facet (termed as Dynamic Navigation in Google Search Appliance) can be defined as a component of the result set when the search output is split down into multiple categories (quite similar to grouping the search results based on certain parameters) and displayed to the end user along with the document count associated that is associated to the individual component. These facets allow user to further restrict their search quite conveniently.