catalina how do i change the frequency of time machine backups

jpagliari wrote:

Thanks. I should have said that I was looking to change the settings manually, not through third-party software. Any idea how to do that in Catalina?

It is automatic with no user settings, therefore you need a third party if that is your intent.

More or less hourly is the default:

How to use Time Machine to back up... your Mac: https://support.apple.com/en-us/HT201250

Search the app store for :

"time machine scheduler"