43488040 ÷ 638 
The aim is to understand the frequency of 638 in 43488040.

On to step 1:
When dividing 4 by 638, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 638

Let's proceed to step 2:
If we divide 43 by 638, we get 0 and a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Fetch the next digit (4) from the dividend, attach it to 43 and continue: 434 / 638

On to step 3:
638 goes into 434 0 times with a remainder of 434.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 434 and we're left with 434.
Bring next digit (8) of the dividend behind the 434 and repeat the process: 4348 / 638

Moving on to step 4:
638 goes into 4348 6 times with a remainder of 520.
The next digit of our result is 6. 
Result so far: 6.0
If we take 3828 away from 4348, we end up with 520.
Append the next digit (8) from the dividend to 520 and continue with: 5208 / 638

Going ahead to step 5:
If we divide 5208 by 638, we get 8 and a remainder of 104.
Write down 8 as next digit of the result. 
Result so far: 68.0
Subtract 5104 from 5208 to get 104.
Append the next digit (0) from the dividend to 104 and continue with: 1040 / 638

Let's proceed to step 6:
When dividing 1040 by 638, we get 1 with a remainder of 402.
Put 1 as the next digit of the answer. 
Result so far: 681.0
Deduct 638 from 1040 and we're left with 402.
Include the next digit (4) from the dividend after 402, then repeat: 4024 / 638

Moving on to step 7:
638 can be fit into 4024 6 times, resulting in a remainder of 196.
Put 6 as the next digit of the answer. 
Result so far: 6816.0
The remainder is 196 after subtracting 3828 from 4024.
Fetch the next digit (0) from the dividend, attach it to 196 and continue: 1960 / 638

Advancing to step 8:
638 goes into 1960 3 times with a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 68163.0
Deduct 1914 from 1960 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 9:
The number 638 fits into 460 0 times, leaving a remainder of 460.
Put 0 as the next digit of the answer. 
Result so far: 68163.0
Deduct 0 from 460 and we're left with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Going ahead to step 10:
4600 divided by 638 is 7 with a remainder of 134.
Put 7 as the next digit of the answer. 
Result so far: 68163.07
Subtracting 4466 from 4600 leaves us with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Step 11:
When dividing 1340 by 638, we get 2 with a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 68163.072
If we take 1276 away from 1340, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 12:
638 can be fit into 640 1 times, resulting in a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 68163.0721
If we take 638 away from 640, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 13:
20 divided by 638 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 68163.0721
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
If we divide 200 by 638, we get 0 and a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 68163.0721
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The quotient of the division is 68163.0721, and the remainder is 2e-05.