Usually doing clinic or doing electives cases are pretty standard 8 hr days. If you have more block time to do more cases on an or day, sure, might work longer than 8 hrs. For you to work 60 days, would be to work at a place that require you to take a lot of call and how busy you would need to be on call. Less call/less busy call = less need to work outside standard business hours.
For a private group, as long as you cover overhead, most won’t care how much or little you work. Depends on what kind of pay cut you willing you take. With that being said, less you are available, less likely to get referrals.
If working for hospital/corporate group, then can negotiate in a contract.
I work between 40-45hrs a week.