This method allows you to aggregate and count instructions with a robust filter object. There are many types of filters you can apply and you can find information regarding those in the section of the docs. The endpoint example here shows off one of the many filters.
Filters
As mentioned above, the api definition here illustrates one of Carpool's many filter types. All queries that accept a filter object in the POST body can make use of any of the potential filters. Please see the Instruction Filters section of the documentation to better understand how they are implemented for instruction queries.
Example - Basic
Program - Cypher Protocol
Description - Count all failed instructions that have an error code of 7.
Description - Count all instructions that satisfy both filter conditions: The instructions must have an argument at path data.creators.address and the percentage share should be set to 100.