We look at the division of 15506890 by 681 
The aim is to understand the frequency of 681 in 15506890.

Step 1:
681 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 681

Step 2:
The number 681 fits into 15 0 times, leaving a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 681

Advancing to step 3:
The number 681 fits into 155 0 times, leaving a remainder of 155.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 155 and we're left with 155.
Bring next digit (0) of the dividend behind the 155 and repeat the process: 1550 / 681

Moving on to step 4:
681 goes into 1550 2 times with a remainder of 188.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 1362 from 1550 to get 188.
Bring next digit (6) of the dividend behind the 188 and repeat the process: 1886 / 681

Advancing to step 5:
When dividing 1886 by 681, we get 2 with a remainder of 524.
Write down 2 as next digit of the result. 
Result so far: 22.0
Deduct 1362 from 1886 and we're left with 524.
Fetch the next digit (8) from the dividend, attach it to 524 and continue: 5248 / 681

Let's proceed to step 6:
681 goes into 5248 7 times with a remainder of 481.
Put 7 as the next digit of the answer. 
Result so far: 227.0
Subtract 4767 from 5248 to get 481.
Append the next digit (9) from the dividend to 481 and continue with: 4819 / 681

Going ahead to step 7:
The number 681 fits into 4819 7 times, leaving a remainder of 52.
The number 7 becomes the next digit in our result. 
Result so far: 2277.0
Deduct 4767 from 4819 and we're left with 52.
Take the next digit (0) from the dividend and append it to 52, then repeat: 520 / 681

Let's proceed to step 8:
When dividing 520 by 681, we get 0 with a remainder of 520.
The next digit of our result is 0. 
Result so far: 22770.0
If we take 0 away from 520, we end up with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Let's proceed to step 9:
681 can be fit into 5200 7 times, resulting in a remainder of 433.
Record the quotient 7 as the next digit in the result. 
Result so far: 22770.7
Subtract 4767 from 5200 to get 433.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4330, and continue the process.

Let's proceed to step 10:
4330 divided by 681 is 6 with a remainder of 244.
The number 6 becomes the next digit in our result. 
Result so far: 22770.76
If we subtract 4086 from 4330, we get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Going ahead to step 11:
681 can be fit into 2440 3 times, resulting in a remainder of 397.
Put 3 as the next digit of the answer. 
Result so far: 22770.763
Subtracting 2043 from 2440 leaves us with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Advancing to step 12:
681 can be fit into 3970 5 times, resulting in a remainder of 565.
Put 5 as the next digit of the answer. 
Result so far: 22770.7635
Deduct 3405 from 3970 and we're left with 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Let's proceed to step 13:
The number 681 fits into 5650 8 times, leaving a remainder of 202.
Use 8 as the next digit of our solution. 
Result so far: 22770.76358
If we take 5448 away from 5650, we end up with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Going ahead to step 14:
When dividing 2020 by 681, we get 2 with a remainder of 658.
Write down 2 as next digit of the result. 
Result so far: 22770.763582
If we take 1362 away from 2020, we end up with 658.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6580, and continue the process.

Moving on to step 15:
6580 divided by 681 is 9 with a remainder of 451.
Write down 9 as next digit of the result. 
Result so far: 22770.7635829
If we subtract 6129 from 6580, we get 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

Advancing to step 16:
4510 divided by 681 is 6 with a remainder of 424.
The number 6 becomes the next digit in our result. 
Result so far: 22770.76358296
If we take 4086 away from 4510, we end up with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

In conclusion, the division gives 22770.76358296 with a balance of 4.24e-07.