Let's divide 43169439 by 638
The aim is to understand the frequency of 638 in 43169439.

On to step 1:
The number 638 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 638

On to step 2:
638 can be fit into 43 0 times, resulting in a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Grab the next digit (1) from the dividend, add it to 43, then carry on: 431 / 638

Let's proceed to step 3:
The number 638 fits into 431 0 times, leaving a remainder of 431.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 431 to get 431.
Take the next digit (6) from the dividend and append it to 431, then repeat: 4316 / 638

Going ahead to step 4:
638 can be fit into 4316 6 times, resulting in a remainder of 488.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtracting 3828 from 4316 leaves us with 488.
Grab the next digit (9) from the dividend, add it to 488, then carry on: 4889 / 638

Let's proceed to step 5:
638 can be fit into 4889 7 times, resulting in a remainder of 423.
Put 7 as the next digit of the answer. 
Result so far: 67.0
Deduct 4466 from 4889 and we're left with 423.
Include the next digit (4) from the dividend after 423, then repeat: 4234 / 638

On to step 6:
If we divide 4234 by 638, we get 6 and a remainder of 406.
The number 6 becomes the next digit in our result. 
Result so far: 676.0
The remainder is 406 after subtracting 3828 from 4234.
Take the next digit (3) from the dividend and append it to 406, then repeat: 4063 / 638

Let's proceed to step 7:
The number 638 fits into 4063 6 times, leaving a remainder of 235.
The number 6 becomes the next digit in our result. 
Result so far: 6766.0
Deduct 3828 from 4063 and we're left with 235.
Include the next digit (9) from the dividend after 235, then repeat: 2359 / 638

Going ahead to step 8:
638 can be fit into 2359 3 times, resulting in a remainder of 445.
Use 3 as the next digit of our solution. 
Result so far: 67663.0
The remainder is 445 after subtracting 1914 from 2359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Moving on to step 9:
If we divide 4450 by 638, we get 6 and a remainder of 622.
The next digit of our result is 6. 
Result so far: 67663.6
Deduct 3828 from 4450 and we're left with 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

Advancing to step 10:
If we divide 6220 by 638, we get 9 and a remainder of 478.
The number 9 becomes the next digit in our result. 
Result so far: 67663.69
Subtract 5742 from 6220 to get 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Advancing to step 11:
The number 638 fits into 4780 7 times, leaving a remainder of 314.
Put 7 as the next digit of the answer. 
Result so far: 67663.697
Subtracting 4466 from 4780 leaves us with 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Let's proceed to step 12:
638 goes into 3140 4 times with a remainder of 588.
Write down 4 as next digit of the result. 
Result so far: 67663.6974
Subtracting 2552 from 3140 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.

Let's proceed to step 13:
If we divide 5880 by 638, we get 9 and a remainder of 138.
Record the quotient 9 as the next digit in the result. 
Result so far: 67663.69749
If we subtract 5742 from 5880, we 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.

Going ahead to step 14:
638 can be fit into 1380 2 times, resulting in a remainder of 104.
Put 2 as the next digit of the answer. 
Result so far: 67663.697492
The remainder is 104 after subtracting 1276 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Advancing to step 15:
638 can be fit into 1040 1 times, resulting in a remainder of 402.
Use 1 as the next digit of our solution. 
Result so far: 67663.6974921
Deduct 638 from 1040 and we're left with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Let's proceed to step 16:
If we divide 4020 by 638, we get 6 and a remainder of 192.
Put 6 as the next digit of the answer. 
Result so far: 67663.69749216
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.

After the division, we end up with 67663.69749216 and a remainder of 1.92e-07.