I have recently learnt that deleting questions is not the correct way to improve our bad quality Q/A. For example on an SE site, If someone had low reputation and asked some bad quality question and later deleted them to come out of it's trouble. But later it is found that they were banned from asking questions and would be given a chance to improve their question-asking after some months.
So, I want to know that how many* questions or answers can a user delete safely without running into any troubles like ban on question asking (and any other trouble if it exist)? Does this depend upon the reputation too — like a highly reputed user can delete more Q/A than a lower one ?
Thanks. Please forgive if my question is too naive. I am learning about SE policies.