The company I retired from is a tier 1 automotive supplier, so we had annual audits to TS16949. If I recall correctly, if previous audits met certain criteria, the next audit could be what was called a desk audit. Much simpler for everyone.
In preparation for the external audit each year, we had company auditors that would audit a plant to the same elements, a couple months before the external audit, to help make sure a plant was ready.
We also went through an ISO 14001 environmental audit, but I believe they were biannual. No biggie.
Then the finance department of each plant had their own audit every year.
On top of all that, a few of our customers weren't satisfied that our plants were TS16949 registered, and insisted on doing their own audits. GM is the worst. So we had to have all our systems audited to the GM system. BIQS (Built in Quality Systems) or something like that.
I worked as a Quality Engineer, so I was involved in all the TS16949 and GM audits, since I was assigned the production cells that built GM parts, and I helped out on the ISO 14001. So yea. Audits are part of life, working at an automotive supplier. Particularly if you work in Quality.