69575103 divided by 638 
The aim is to understand the frequency of 638 in 69575103.

Moving on to step 1:
If we divide 6 by 638, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 638

On to step 2:
638 goes into 69 0 times with a remainder of 69.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 69, we get 69.
Take the next digit (5) from the dividend and append it to 69, then repeat: 695 / 638

Going ahead to step 3:
The number 638 fits into 695 1 times, leaving a remainder of 57.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 638 away from 695, we end up with 57.
Grab the next digit (7) from the dividend, add it to 57, then carry on: 577 / 638

Going ahead to step 4:
The number 638 fits into 577 0 times, leaving a remainder of 577.
Use 0 as the next digit of our solution. 
Result so far: 10.0
The remainder is 577 after subtracting 0 from 577.
Include the next digit (5) from the dividend after 577, then repeat: 5775 / 638

Moving on to step 5:
5775 divided by 638 is 9 with a remainder of 33.
The next digit of our result is 9. 
Result so far: 109.0
Subtract 5742 from 5775 to get 33.
Fetch the next digit (1) from the dividend, attach it to 33 and continue: 331 / 638

Advancing to step 6:
When dividing 331 by 638, we get 0 with a remainder of 331.
Record the quotient 0 as the next digit in the result. 
Result so far: 1090.0
Subtract 0 from 331 to get 331.
Grab the next digit (0) from the dividend, add it to 331, then carry on: 3310 / 638

On to step 7:
When dividing 3310 by 638, we get 5 with a remainder of 120.
Record the quotient 5 as the next digit in the result. 
Result so far: 10905.0
Deduct 3190 from 3310 and we're left with 120.
Include the next digit (3) from the dividend after 120, then repeat: 1203 / 638

Going ahead to step 8:
If we divide 1203 by 638, we get 1 and a remainder of 565.
Record the quotient 1 as the next digit in the result. 
Result so far: 109051.0
The remainder is 565 after subtracting 638 from 1203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Going ahead to step 9:
The number 638 fits into 5650 8 times, leaving a remainder of 546.
Put 8 as the next digit of the answer. 
Result so far: 109051.8
Subtract 5104 from 5650 to get 546.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5460, and continue the process.

Moving on to step 10:
638 can be fit into 5460 8 times, resulting in a remainder of 356.
The next digit of our result is 8. 
Result so far: 109051.88
If we take 5104 away from 5460, we end up with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

The quotient of the division is 109051.88, and the remainder is 0.356.