We look at the division of 30557598 by 638 
The aim is to understand the frequency of 638 in 30557598.

Moving on to step 1:
638 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 638

Advancing to step 2:
The number 638 fits into 30 0 times, leaving a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 30 after subtracting 0 from 30.
Fetch the next digit (5) from the dividend, attach it to 30 and continue: 305 / 638

Let's proceed to step 3:
If we divide 305 by 638, we get 0 and a remainder of 305.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 305 after subtracting 0 from 305.
Append the next digit (5) from the dividend to 305 and continue with: 3055 / 638

Step 4:
When dividing 3055 by 638, we get 4 with a remainder of 503.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 2552 from 3055 to get 503.
Grab the next digit (7) from the dividend, add it to 503, then carry on: 5037 / 638

Going ahead to step 5:
638 can be fit into 5037 7 times, resulting in a remainder of 571.
The next digit of our result is 7. 
Result so far: 47.0
The remainder is 571 after subtracting 4466 from 5037.
Fetch the next digit (5) from the dividend, attach it to 571 and continue: 5715 / 638

Advancing to step 6:
If we divide 5715 by 638, we get 8 and a remainder of 611.
Record the quotient 8 as the next digit in the result. 
Result so far: 478.0
If we take 5104 away from 5715, we end up with 611.
Bring next digit (9) of the dividend behind the 611 and repeat the process: 6119 / 638

Moving on to step 7:
6119 divided by 638 is 9 with a remainder of 377.
Write down 9 as next digit of the result. 
Result so far: 4789.0
Subtracting 5742 from 6119 leaves us with 377.
Include the next digit (8) from the dividend after 377, then repeat: 3778 / 638

Step 8:
When dividing 3778 by 638, we get 5 with a remainder of 588.
Use 5 as the next digit of our solution. 
Result so far: 47895.0
Subtracting 3190 from 3778 leaves us with 588.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5880, and continue the process.

Advancing to step 9:
The number 638 fits into 5880 9 times, leaving a remainder of 138.
Use 9 as the next digit of our solution. 
Result so far: 47895.9
Subtract 5742 from 5880 to get 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Step 10:
When dividing 1380 by 638, we get 2 with a remainder of 104.
Record the quotient 2 as the next digit in the result. 
Result so far: 47895.92
If we take 1276 away from 1380, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Step 11:
638 goes into 1040 1 times with a remainder of 402.
Write down 1 as next digit of the result. 
Result so far: 47895.921
If we subtract 638 from 1040, we get 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

On to step 12:
638 goes into 4020 6 times with a remainder of 192.
The next digit of our result is 6. 
Result so far: 47895.9216
Subtracting 3828 from 4020 leaves us with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Step 13:
638 can be fit into 1920 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 47895.92163
Deduct 1914 from 1920 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 14:
The number 638 fits into 60 0 times, leaving a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 47895.92163
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 15:
If we divide 600 by 638, we get 0 and a remainder of 600.
The next digit of our result is 0. 
Result so far: 47895.92163
Subtracting 0 from 600 leaves us with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

After the division, we end up with 47895.92163 and a remainder of 6e-06.