# rate(relativeTo:) Queries the relative rate of one timebase or clock relative to another timebase or clock. ``` func rate(relativeTo clockOrTimebase: T) -> Double where T : CMSyncProtocol ``` ## Parameters `clockOrTimebase` The clock to compare to. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)