We look at the division of 66547987 by 631 
The aim is to understand the frequency of 631 in 66547987.

Going ahead to step 1:
When dividing 6 by 631, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 631

Going ahead to step 2:
631 can be fit into 66 0 times, resulting in a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Take the next digit (5) from the dividend and append it to 66, then repeat: 665 / 631

Let's proceed to step 3:
When dividing 665 by 631, we get 1 with a remainder of 34.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 631 from 665, we get 34.
Fetch the next digit (4) from the dividend, attach it to 34 and continue: 344 / 631

On to step 4:
The number 631 fits into 344 0 times, leaving a remainder of 344.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 344, we end up with 344.
Include the next digit (7) from the dividend after 344, then repeat: 3447 / 631

Advancing to step 5:
If we divide 3447 by 631, we get 5 and a remainder of 292.
Record the quotient 5 as the next digit in the result. 
Result so far: 105.0
Subtract 3155 from 3447 to get 292.
Take the next digit (9) from the dividend and append it to 292, then repeat: 2929 / 631

Going ahead to step 6:
2929 divided by 631 is 4 with a remainder of 405.
The next digit of our result is 4. 
Result so far: 1054.0
Subtracting 2524 from 2929 leaves us with 405.
Fetch the next digit (8) from the dividend, attach it to 405 and continue: 4058 / 631

On to step 7:
When dividing 4058 by 631, we get 6 with a remainder of 272.
The number 6 becomes the next digit in our result. 
Result so far: 10546.0
If we subtract 3786 from 4058, we get 272.
Append the next digit (7) from the dividend to 272 and continue with: 2727 / 631

Going ahead to step 8:
2727 divided by 631 is 4 with a remainder of 203.
The number 4 becomes the next digit in our result. 
Result so far: 105464.0
The remainder is 203 after subtracting 2524 from 2727.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Let's proceed to step 9:
2030 divided by 631 is 3 with a remainder of 137.
The number 3 becomes the next digit in our result. 
Result so far: 105464.3
Deduct 1893 from 2030 and we're left with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

On to step 10:
When dividing 1370 by 631, we get 2 with a remainder of 108.
The number 2 becomes the next digit in our result. 
Result so far: 105464.32
If we subtract 1262 from 1370, we get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Going ahead to step 11:
The number 631 fits into 1080 1 times, leaving a remainder of 449.
Write down 1 as next digit of the result. 
Result so far: 105464.321
Subtract 631 from 1080 to get 449.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4490, and continue the process.

Going ahead to step 12:
The number 631 fits into 4490 7 times, leaving a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 105464.3217
Subtract 4417 from 4490 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 13:
631 goes into 730 1 times with a remainder of 99.
Use 1 as the next digit of our solution. 
Result so far: 105464.32171
Deduct 631 from 730 and we're left with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Advancing to step 14:
When dividing 990 by 631, we get 1 with a remainder of 359.
The number 1 becomes the next digit in our result. 
Result so far: 105464.321711
The remainder is 359 after subtracting 631 from 990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

In conclusion, the division gives 105464.321711 with a balance of 3.59e-05.