Returns aggregated statistics about how often a given phone number has been validated within the current account.
Use this endpoint to drive reuse and throttling decisions on the caller side, for example to avoid issuing redundant validation calls for numbers already checked many times.

The lookup is local to the account and does not call the external validation provider, so it is not billable and is safe to call frequently.
The optional interaction_id query parameter is used purely for correlation in logs and does not affect the returned counts.
Counts only cover validations performed via the validation endpoint; numbers never validated return zero.