That doesn't explain what they plan on doing with the information.
If you're going to delete rules with zero hit count, for instance, you can automate that.
If you just want to know how many rules are disabled on a given policy layer, something like the following would work, assuming a rulebase of less than 500 lines:
mgmt_cli -r true --format json show access-rulebase name "MyPolicy Network" | jq '.rulebase[].enabled' | grep false | wc -l
Variations of the above could be used to give you other information. See also the API docs.