all in a days work
all in a day's work or all in the day's work {adj. phr.}, {informal}
Unpleasant or bad but to be expected; not harder than usual; not unusual.
Keeping ants away from a picnic lunch is all in the day's work.
When the car had a flat tire, Father said that it was all in a day's work.
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Source: A Dictionary of American Idioms
