We look at the division of 81644384 by 634 
The aim is to understand the frequency of 634 in 81644384.

On to step 1:
8 divided by 634 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 634

Going ahead to step 2:
The number 634 fits into 81 0 times, leaving a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Fetch the next digit (6) from the dividend, attach it to 81 and continue: 816 / 634

Moving on to step 3:
If we divide 816 by 634, we get 1 and a remainder of 182.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 634 away from 816, we end up with 182.
Take the next digit (4) from the dividend and append it to 182, then repeat: 1824 / 634

Going ahead to step 4:
When dividing 1824 by 634, we get 2 with a remainder of 556.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 1268 from 1824 leaves us with 556.
Grab the next digit (4) from the dividend, add it to 556, then carry on: 5564 / 634

Moving on to step 5:
If we divide 5564 by 634, we get 8 and a remainder of 492.
The number 8 becomes the next digit in our result. 
Result so far: 128.0
Subtract 5072 from 5564 to get 492.
Fetch the next digit (3) from the dividend, attach it to 492 and continue: 4923 / 634

Advancing to step 6:
4923 divided by 634 is 7 with a remainder of 485.
Record the quotient 7 as the next digit in the result. 
Result so far: 1287.0
The remainder is 485 after subtracting 4438 from 4923.
Append the next digit (8) from the dividend to 485 and continue with: 4858 / 634

Advancing to step 7:
If we divide 4858 by 634, we get 7 and a remainder of 420.
The number 7 becomes the next digit in our result. 
Result so far: 12877.0
Deduct 4438 from 4858 and we're left with 420.
Take the next digit (4) from the dividend and append it to 420, then repeat: 4204 / 634

Going ahead to step 8:
4204 divided by 634 is 6 with a remainder of 400.
The next digit of our result is 6. 
Result so far: 128776.0
Subtracting 3804 from 4204 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Moving on to step 9:
If we divide 4000 by 634, we get 6 and a remainder of 196.
Write down 6 as next digit of the result. 
Result so far: 128776.6
Subtract 3804 from 4000 to get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Moving on to step 10:
1960 divided by 634 is 3 with a remainder of 58.
Put 3 as the next digit of the answer. 
Result so far: 128776.63
Subtract 1902 from 1960 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 11:
If we divide 580 by 634, we get 0 and a remainder of 580.
Record the quotient 0 as the next digit in the result. 
Result so far: 128776.63
Subtracting 0 from 580 leaves us with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Going ahead to step 12:
5800 divided by 634 is 9 with a remainder of 94.
Write down 9 as next digit of the result. 
Result so far: 128776.6309
If we take 5706 away from 5800, we end up with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Going ahead to step 13:
634 can be fit into 940 1 times, resulting in a remainder of 306.
Record the quotient 1 as the next digit in the result. 
Result so far: 128776.63091
Deduct 634 from 940 and we're left with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Moving on to step 14:
The number 634 fits into 3060 4 times, leaving a remainder of 524.
The number 4 becomes the next digit in our result. 
Result so far: 128776.630914
Subtracting 2536 from 3060 leaves us with 524.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

Moving on to step 15:
If we divide 5240 by 634, we get 8 and a remainder of 168.
Use 8 as the next digit of our solution. 
Result so far: 128776.6309148
Subtracting 5072 from 5240 leaves us with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

On to step 16:
634 can be fit into 1680 2 times, resulting in a remainder of 412.
The number 2 becomes the next digit in our result. 
Result so far: 128776.63091482
The remainder is 412 after subtracting 1268 from 1680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

After the division, we end up with 128776.63091482 and a remainder of 4.12e-07.