We look at the division of 15829557 by 657 
The aim is to understand the frequency of 657 in 15829557.

Going ahead to step 1:
657 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 657

Moving on to step 2:
657 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 657

Step 3:
657 goes into 158 0 times with a remainder of 158.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 158 after subtracting 0 from 158.
Append the next digit (2) from the dividend to 158 and continue with: 1582 / 657

Going ahead to step 4:
657 goes into 1582 2 times with a remainder of 268.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 268 after subtracting 1314 from 1582.
Fetch the next digit (9) from the dividend, attach it to 268 and continue: 2689 / 657

Let's proceed to step 5:
657 goes into 2689 4 times with a remainder of 61.
Put 4 as the next digit of the answer. 
Result so far: 24.0
Deduct 2628 from 2689 and we're left with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 657

Moving on to step 6:
When dividing 615 by 657, we get 0 with a remainder of 615.
The number 0 becomes the next digit in our result. 
Result so far: 240.0
Subtract 0 from 615 to get 615.
Fetch the next digit (5) from the dividend, attach it to 615 and continue: 6155 / 657

Let's proceed to step 7:
657 can be fit into 6155 9 times, resulting in a remainder of 242.
Use 9 as the next digit of our solution. 
Result so far: 2409.0
Deduct 5913 from 6155 and we're left with 242.
Append the next digit (7) from the dividend to 242 and continue with: 2427 / 657

Going ahead to step 8:
2427 divided by 657 is 3 with a remainder of 456.
The next digit of our result is 3. 
Result so far: 24093.0
Subtracting 1971 from 2427 leaves us with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

On to step 9:
The number 657 fits into 4560 6 times, leaving a remainder of 618.
Record the quotient 6 as the next digit in the result. 
Result so far: 24093.6
If we subtract 3942 from 4560, we get 618.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Going ahead to step 10:
6180 divided by 657 is 9 with a remainder of 267.
Put 9 as the next digit of the answer. 
Result so far: 24093.69
Subtract 5913 from 6180 to get 267.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2670, and continue the process.

Let's proceed to step 11:
657 goes into 2670 4 times with a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 24093.694
If we take 2628 away from 2670, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 12:
The number 657 fits into 420 0 times, leaving a remainder of 420.
The next digit of our result is 0. 
Result so far: 24093.694
Deduct 0 from 420 and we're left with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Step 13:
When dividing 4200 by 657, we get 6 with a remainder of 258.
The next digit of our result is 6. 
Result so far: 24093.69406
If we subtract 3942 from 4200, we get 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Step 14:
When dividing 2580 by 657, we get 3 with a remainder of 609.
The next digit of our result is 3. 
Result so far: 24093.694063
If we subtract 1971 from 2580, we get 609.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6090, and continue the process.

Moving on to step 15:
The number 657 fits into 6090 9 times, leaving a remainder of 177.
Record the quotient 9 as the next digit in the result. 
Result so far: 24093.6940639
Subtracting 5913 from 6090 leaves us with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Advancing to step 16:
The number 657 fits into 1770 2 times, leaving a remainder of 456.
The next digit of our result is 2. 
Result so far: 24093.69406392
Subtracting 1314 from 1770 leaves us with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

The quotient of the division is 24093.69406392, and the remainder is 4.56e-07.