The term 'Coal Quantity' can be broken down into two crossword solutions: 'LUMP' (4 letters) and 'TON' (3 letters). LUMP is a term used to describe coal that has been mined in a particular size, usually between 25mm and 300mm. TON is a unit of measurement for weight, and is equal to 2, 000 pounds or 907 kilograms. Therefore, the term 'Coal Quantity' can be defined as the amount of coal measured in lumps or tons.