The answer to your question is not straightforward. In summary there are potential savings to be had in some places and not others.
Start with reviewing pages 3.13 and 3.14 in the Life Limited Components section of the R22 maintenance manual:
https://robinsonheli.com/r22-maintenance-manual/
P.S. It's "Hobbs" not "HOBS". It's a name, not an acronym.