There are many other things you can do that will greatly change how long you spend doing a quest. Some people might be forced to redo a fight 5-10 times before defeating it on higher difficulties.
Here are somethings that can have a huge impact on the amount of time you actually play:ġ) Do you read every book, note etc that you come across?Ģ) Do you loot every container that you come across?ģ) Do you go to side rooms in a building or follow straight to the quest circle?Ĥ) During conversations do you just select the main quest option or do you exhaust all dialogue options?ĥ) Do you fast ravel or go to each destination on foot/horse?Ħ) What difficulty are you playing on which might mean you have to do a fight more than once. No offense but questions like these are kind of silly because 'how long' depends on how dedicated you want to be in playing.