We look at the division of 15663998 by 755 
The aim is to understand the frequency of 755 in 15663998.

Advancing to step 1:
755 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 755

Step 2:
755 goes into 15 0 times with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Include the next digit (6) from the dividend after 15, then repeat: 156 / 755

Going ahead to step 3:
755 goes into 156 0 times with a remainder of 156.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 156 leaves us with 156.
Append the next digit (6) from the dividend to 156 and continue with: 1566 / 755

Step 4:
If we divide 1566 by 755, we get 2 and a remainder of 56.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 1510 from 1566 and we're left with 56.
Fetch the next digit (3) from the dividend, attach it to 56 and continue: 563 / 755

Step 5:
755 can be fit into 563 0 times, resulting in a remainder of 563.
Use 0 as the next digit of our solution. 
Result so far: 20.0
If we take 0 away from 563, we end up with 563.
Bring next digit (9) of the dividend behind the 563 and repeat the process: 5639 / 755

Step 6:
755 can be fit into 5639 7 times, resulting in a remainder of 354.
The number 7 becomes the next digit in our result. 
Result so far: 207.0
Deduct 5285 from 5639 and we're left with 354.
Grab the next digit (9) from the dividend, add it to 354, then carry on: 3549 / 755

On to step 7:
3549 divided by 755 is 4 with a remainder of 529.
Record the quotient 4 as the next digit in the result. 
Result so far: 2074.0
Subtract 3020 from 3549 to get 529.
Grab the next digit (8) from the dividend, add it to 529, then carry on: 5298 / 755

Let's proceed to step 8:
5298 divided by 755 is 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 20747.0
Deduct 5285 from 5298 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 9:
When dividing 130 by 755, we get 0 with a remainder of 130.
Use 0 as the next digit of our solution. 
Result so far: 20747.0
If we subtract 0 from 130, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 10:
When dividing 1300 by 755, we get 1 with a remainder of 545.
The number 1 becomes the next digit in our result. 
Result so far: 20747.01
The remainder is 545 after subtracting 755 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

On to step 11:
5450 divided by 755 is 7 with a remainder of 165.
The next digit of our result is 7. 
Result so far: 20747.017
If we subtract 5285 from 5450, we get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

On to step 12:
The number 755 fits into 1650 2 times, leaving a remainder of 140.
Use 2 as the next digit of our solution. 
Result so far: 20747.0172
If we subtract 1510 from 1650, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 13:
When dividing 1400 by 755, we get 1 with a remainder of 645.
Write down 1 as next digit of the result. 
Result so far: 20747.01721
The remainder is 645 after subtracting 755 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6450, and continue the process.

Going ahead to step 14:
When dividing 6450 by 755, we get 8 with a remainder of 410.
Write down 8 as next digit of the result. 
Result so far: 20747.017218
Subtract 6040 from 6450 to get 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Step 15:
If we divide 4100 by 755, we get 5 and a remainder of 325.
Record the quotient 5 as the next digit in the result. 
Result so far: 20747.0172185
If we take 3775 away from 4100, we end up with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Step 16:
When dividing 3250 by 755, we get 4 with a remainder of 230.
The number 4 becomes the next digit in our result. 
Result so far: 20747.01721854
Subtract 3020 from 3250 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

In conclusion, the division gives 20747.01721854 with a balance of 2.3e-07.