In the past, a professional job might mean extended periods of travel by rail etc with little work to do. A small acreage farmer has to wait for plants to grow.

The advent of factories with limitless and constant demand for labor is a new development of the industrial revolution.

Even on a small farm there is always work to do.

That doesn't mean that there isn't any downtime though. Most activity would be confined to daylight hours if nothing else. You'd probably do less on rainy days, and avoid hard work during the peak heat hours in the summer.