Hello Baithi,
As per my understanding action usage report from portal fetches data from table GRACMGMTACTUSAGE. I wonder that GRAC_ERM_ACTION_USG doesn't contain any field EXECUTION_COUNT which table GRACMGMTACTUSAGE does contain.
Just wandering to understand relationship between report you shared and the table from where execution count detail is fetched.
Best Regards,
Mukesh