Let's divide 33385571 by 638
The aim is to understand the frequency of 638 in 33385571.

Step 1:
638 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 638

Let's proceed to step 2:
638 goes into 33 0 times with a remainder of 33.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 33 to get 33.
Take the next digit (3) from the dividend and append it to 33, then repeat: 333 / 638

Going ahead to step 3:
The number 638 fits into 333 0 times, leaving a remainder of 333.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 333, we get 333.
Fetch the next digit (8) from the dividend, attach it to 333 and continue: 3338 / 638

On to step 4:
When dividing 3338 by 638, we get 5 with a remainder of 148.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 148 after subtracting 3190 from 3338.
Append the next digit (5) from the dividend to 148 and continue with: 1485 / 638

Moving on to step 5:
638 goes into 1485 2 times with a remainder of 209.
The number 2 becomes the next digit in our result. 
Result so far: 52.0
If we take 1276 away from 1485, we end up with 209.
Include the next digit (5) from the dividend after 209, then repeat: 2095 / 638

Going ahead to step 6:
638 can be fit into 2095 3 times, resulting in a remainder of 181.
The number 3 becomes the next digit in our result. 
Result so far: 523.0
Subtract 1914 from 2095 to get 181.
Bring next digit (7) of the dividend behind the 181 and repeat the process: 1817 / 638

On to step 7:
If we divide 1817 by 638, we get 2 and a remainder of 541.
Use 2 as the next digit of our solution. 
Result so far: 5232.0
The remainder is 541 after subtracting 1276 from 1817.
Grab the next digit (1) from the dividend, add it to 541, then carry on: 5411 / 638

Let's proceed to step 8:
638 goes into 5411 8 times with a remainder of 307.
The next digit of our result is 8. 
Result so far: 52328.0
Subtracting 5104 from 5411 leaves us with 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

On to step 9:
If we divide 3070 by 638, we get 4 and a remainder of 518.
The next digit of our result is 4. 
Result so far: 52328.4
Deduct 2552 from 3070 and we're left with 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Let's proceed to step 10:
638 goes into 5180 8 times with a remainder of 76.
Put 8 as the next digit of the answer. 
Result so far: 52328.48
Subtract 5104 from 5180 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 11:
If we divide 760 by 638, we get 1 and a remainder of 122.
The number 1 becomes the next digit in our result. 
Result so far: 52328.481
Subtract 638 from 760 to get 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Going ahead to step 12:
The number 638 fits into 1220 1 times, leaving a remainder of 582.
Put 1 as the next digit of the answer. 
Result so far: 52328.4811
Subtract 638 from 1220 to get 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

After the division, we end up with 52328.4811 and a remainder of 0.00582.