Being a management system auditor is one of the befitting professions anyone can join, But then, it doesn't end there, you have to know the necessary things while being an auditor. And one of those things you need to know is on internal audit, and how you should schedule it's frequency. I have written a compelling article on this topic: [url]How often should you do internal audits according to the ISO management system?[https://www.validworth.com/internal-audit-frequency-iso-management-requirements/] Read it on the link below and if you have any questions to ask, do let me know in the comment sections. https://www.validworth.com/internal-audit-frequency-iso-management-requirements/