Safe, sensible to turn off BRANCH circuit breaker for range, every day when house is empty?
I can’t quite make out the brand of breaker or the age. If you are using the circuit breaker like a switch it should be switch rated “SWD”  stamped on the breaker or the breaker is listed for switch duty. Many modern breakers are listed for switch duty but not stamped. 
The one advantage you have is the oven s not on when you throw the breaker off or on, this helps but constantly flipping the breaker not rated for switch duty damages the hammers and can cause early failure.