We look at the division of 52481912 by 685 
The aim is to understand the frequency of 685 in 52481912.

Step 1:
When dividing 5 by 685, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 685

Advancing to step 2:
685 goes into 52 0 times with a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 52, we end up with 52.
Grab the next digit (4) from the dividend, add it to 52, then carry on: 524 / 685

Advancing to step 3:
524 divided by 685 is 0 with a remainder of 524.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 524 to get 524.
Include the next digit (8) from the dividend after 524, then repeat: 5248 / 685

Going ahead to step 4:
5248 divided by 685 is 7 with a remainder of 453.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 4795 from 5248, we get 453.
Fetch the next digit (1) from the dividend, attach it to 453 and continue: 4531 / 685

Let's proceed to step 5:
When dividing 4531 by 685, we get 6 with a remainder of 421.
Put 6 as the next digit of the answer. 
Result so far: 76.0
If we subtract 4110 from 4531, we get 421.
Append the next digit (9) from the dividend to 421 and continue with: 4219 / 685

On to step 6:
If we divide 4219 by 685, we get 6 and a remainder of 109.
Use 6 as the next digit of our solution. 
Result so far: 766.0
Subtracting 4110 from 4219 leaves us with 109.
Append the next digit (1) from the dividend to 109 and continue with: 1091 / 685

Let's proceed to step 7:
If we divide 1091 by 685, we get 1 and a remainder of 406.
The next digit of our result is 1. 
Result so far: 7661.0
Deduct 685 from 1091 and we're left with 406.
Take the next digit (2) from the dividend and append it to 406, then repeat: 4062 / 685

On to step 8:
The number 685 fits into 4062 5 times, leaving a remainder of 637.
Put 5 as the next digit of the answer. 
Result so far: 76615.0
Subtract 3425 from 4062 to get 637.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6370, and continue the process.

Moving on to step 9:
If we divide 6370 by 685, we get 9 and a remainder of 205.
Write down 9 as next digit of the result. 
Result so far: 76615.9
Subtract 6165 from 6370 to get 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Step 10:
If we divide 2050 by 685, we get 2 and a remainder of 680.
The next digit of our result is 2. 
Result so far: 76615.92
Subtracting 1370 from 2050 leaves us with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Advancing to step 11:
When dividing 6800 by 685, we get 9 with a remainder of 635.
Put 9 as the next digit of the answer. 
Result so far: 76615.929
The remainder is 635 after subtracting 6165 from 6800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

Let's proceed to step 12:
685 can be fit into 6350 9 times, resulting in a remainder of 185.
Put 9 as the next digit of the answer. 
Result so far: 76615.9299
The remainder is 185 after subtracting 6165 from 6350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

After the division, we end up with 76615.9299 and a remainder of 0.00185.