We look at the division of 6543525 by 681 
The aim is to understand the frequency of 681 in 6543525.

Moving on to step 1:
When dividing 6 by 681, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 681

Let's proceed to step 2:
65 divided by 681 is 0 with a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 65 and we're left with 65.
Grab the next digit (4) from the dividend, add it to 65, then carry on: 654 / 681

Step 3:
654 divided by 681 is 0 with a remainder of 654.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 654 leaves us with 654.
Fetch the next digit (3) from the dividend, attach it to 654 and continue: 6543 / 681

Going ahead to step 4:
If we divide 6543 by 681, we get 9 and a remainder of 414.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 414 after subtracting 6129 from 6543.
Append the next digit (5) from the dividend to 414 and continue with: 4145 / 681

Advancing to step 5:
681 can be fit into 4145 6 times, resulting in a remainder of 59.
Write down 6 as next digit of the result. 
Result so far: 96.0
The remainder is 59 after subtracting 4086 from 4145.
Include the next digit (2) from the dividend after 59, then repeat: 592 / 681

Advancing to step 6:
If we divide 592 by 681, we get 0 and a remainder of 592.
Use 0 as the next digit of our solution. 
Result so far: 960.0
The remainder is 592 after subtracting 0 from 592.
Fetch the next digit (5) from the dividend, attach it to 592 and continue: 5925 / 681

On to step 7:
The number 681 fits into 5925 8 times, leaving a remainder of 477.
Write down 8 as next digit of the result. 
Result so far: 9608.0
If we take 5448 away from 5925, we end up with 477.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

Step 8:
4770 divided by 681 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 9608.7
Deduct 4767 from 4770 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 9:
681 goes into 30 0 times with a remainder of 30.
The next digit of our result is 0. 
Result so far: 9608.7
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
681 can be fit into 300 0 times, resulting in a remainder of 300.
Write down 0 as next digit of the result. 
Result so far: 9608.7
Subtracting 0 from 300 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The quotient of the division is 9608.7, and the remainder is 0.03.