You cannot alter the backup schedule via MacOS, but there are several third-party apps that will allow you to modify it. Launch App Store and search for Time Machine. I have not personally used any of them so I can't give a recommendation.
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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