Suggestion to add the default interval of scheduler in the documentation
📚 Documentation
The default interval of scheduler is per epoch. However, it is not explicitly mentioned in the documentation. I have to dig into the code and figure it out.

  
    
      pytorch-lightning/pytorch_lightning/trainer/optimizers.py
    
    
         Line 86
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           default_config = {'interval': 'epoch',  # default every epoch 
        
    
  


I understand it is sort of common sense for people who are already familiar with training the network in PyTorch, but if lightning is aiming for the more general public, then adding this explicitly into the documentation may help people to better understand the training pipeline of their network.
Maybe we need to add all the default ("interval", "frequency", "reduce_on_plateau", "monitor") into the documentation explicitly.
By the way, I am not sure if the default of scheduler in TF is in step or epoch, but some popular networks (e.g. DeepLabV3) using step instead of epoch as the default interval for their scheduler,