The phrase "all in a day's work" is often used to describe a task or duty that is considered normal or routine. However, there are a number of synonyms that can be used to convey the same meaning. For example, "business as usual" implies that the task or duty is just another part of one's job. "Run of the mill" suggests that the task or duty is plain or ordinary. "Ho-hum" carries a similar connotation of dullness or boredom. All of these synonyms emphasize the routine nature of the task or duty, but each one adds its own nuance to the overall meaning.
