We're dividing 99540621 by 681 
The aim is to understand the frequency of 681 in 99540621.

On to step 1:
The number 681 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 681

On to step 2:
681 can be fit into 99 0 times, resulting in a remainder of 99.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Bring next digit (5) of the dividend behind the 99 and repeat the process: 995 / 681

Going ahead to step 3:
995 divided by 681 is 1 with a remainder of 314.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 681 from 995 to get 314.
Bring next digit (4) of the dividend behind the 314 and repeat the process: 3144 / 681

Moving on to step 4:
If we divide 3144 by 681, we get 4 and a remainder of 420.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 2724 from 3144, we get 420.
Fetch the next digit (0) from the dividend, attach it to 420 and continue: 4200 / 681

On to step 5:
681 can be fit into 4200 6 times, resulting in a remainder of 114.
Record the quotient 6 as the next digit in the result. 
Result so far: 146.0
If we subtract 4086 from 4200, we get 114.
Bring next digit (6) of the dividend behind the 114 and repeat the process: 1146 / 681

Advancing to step 6:
1146 divided by 681 is 1 with a remainder of 465.
Write down 1 as next digit of the result. 
Result so far: 1461.0
Subtract 681 from 1146 to get 465.
Grab the next digit (2) from the dividend, add it to 465, then carry on: 4652 / 681

Moving on to step 7:
When dividing 4652 by 681, we get 6 with a remainder of 566.
Put 6 as the next digit of the answer. 
Result so far: 14616.0
Subtract 4086 from 4652 to get 566.
Append the next digit (1) from the dividend to 566 and continue with: 5661 / 681

On to step 8:
5661 divided by 681 is 8 with a remainder of 213.
Use 8 as the next digit of our solution. 
Result so far: 146168.0
If we subtract 5448 from 5661, we get 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Advancing to step 9:
681 can be fit into 2130 3 times, resulting in a remainder of 87.
The next digit of our result is 3. 
Result so far: 146168.3
If we subtract 2043 from 2130, we get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Step 10:
681 can be fit into 870 1 times, resulting in a remainder of 189.
The number 1 becomes the next digit in our result. 
Result so far: 146168.31
Deduct 681 from 870 and we're left with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Moving on to step 11:
1890 divided by 681 is 2 with a remainder of 528.
Record the quotient 2 as the next digit in the result. 
Result so far: 146168.312
If we subtract 1362 from 1890, we get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

On to step 12:
681 goes into 5280 7 times with a remainder of 513.
The number 7 becomes the next digit in our result. 
Result so far: 146168.3127
The remainder is 513 after subtracting 4767 from 5280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5130, and continue the process.

Step 13:
The number 681 fits into 5130 7 times, leaving a remainder of 363.
The next digit of our result is 7. 
Result so far: 146168.31277
The remainder is 363 after subtracting 4767 from 5130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

Our division results in 146168.31277 with a remaining 0.000363.