Many people described freehand sketching as a drawing that deal with pictorial and orthographic sometime, but it difficult to get the real pictures or definition of the sketching.
Those that draw with their free hand are called the artisan that mixed water colour to make a picture of human being. But there is different between freehand sketching and drawing and the real difference is dimensions.
The one with dimension is actual drawing and makes it difference from freehand sketching that had no dimension.
Good example of drawing is the building plan of a building with dimension and for the sketching is pictorial one like photography. The similar between the aforementioned drawing are both drawn with pencil and eraser.
What a nice drawing. I love this