Well, its what fridges do
By the Thumbrule you could say, the older the model, the wider the temperature range in one cycle to generate the wanted medium temperature. Older models cycle up to +-6°C around the wanted medium.
The newest model is the green line, only cycling +-1°.
You can also see in the grey -24°C line what happens if you freeze the sensor in a bottle of ice to have less temperature fluctuation