USPTO patent grant bulk-data contains two fields number-of-figures and number-of-drawings. Figures number is always higher or same. So, I guess that drawings is a sub-set of figures.
I have looked on the UPSTO information page, but there is no clear distinction between figures and drawings mentioned. In fact they seem to use the terms interchangeably in some places.
So, I'm curios what is technical difference between figure and drawing?