We look at the division of 8302506 by 438 
The aim is to understand the frequency of 438 in 8302506.

On to step 1:
When dividing 8 by 438, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 438

Let's proceed to step 2:
83 divided by 438 is 0 with a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 83 and we're left with 83.
Include the next digit (0) from the dividend after 83, then repeat: 830 / 438

Step 3:
438 goes into 830 1 times with a remainder of 392.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 438 from 830 and we're left with 392.
Append the next digit (2) from the dividend to 392 and continue with: 3922 / 438

Step 4:
3922 divided by 438 is 8 with a remainder of 418.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
Subtracting 3504 from 3922 leaves us with 418.
Bring next digit (5) of the dividend behind the 418 and repeat the process: 4185 / 438

Let's proceed to step 5:
The number 438 fits into 4185 9 times, leaving a remainder of 243.
Write down 9 as next digit of the result. 
Result so far: 189.0
Subtract 3942 from 4185 to get 243.
Grab the next digit (0) from the dividend, add it to 243, then carry on: 2430 / 438

Step 6:
When dividing 2430 by 438, we get 5 with a remainder of 240.
The number 5 becomes the next digit in our result. 
Result so far: 1895.0
If we take 2190 away from 2430, we end up with 240.
Include the next digit (6) from the dividend after 240, then repeat: 2406 / 438

On to step 7:
2406 divided by 438 is 5 with a remainder of 216.
The number 5 becomes the next digit in our result. 
Result so far: 18955.0
If we take 2190 away from 2406, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 8:
2160 divided by 438 is 4 with a remainder of 408.
Use 4 as the next digit of our solution. 
Result so far: 18955.4
Deduct 1752 from 2160 and we're left with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Moving on to step 9:
438 can be fit into 4080 9 times, resulting in a remainder of 138.
Record the quotient 9 as the next digit in the result. 
Result so far: 18955.49
If we subtract 3942 from 4080, 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.

Moving on to step 10:
438 can be fit into 1380 3 times, resulting in a remainder of 66.
Record the quotient 3 as the next digit in the result. 
Result so far: 18955.493
If we take 1314 away from 1380, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 11:
When dividing 660 by 438, we get 1 with a remainder of 222.
Record the quotient 1 as the next digit in the result. 
Result so far: 18955.4931
Deduct 438 from 660 and we're left with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

On to step 12:
The number 438 fits into 2220 5 times, leaving a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 18955.49315
If we subtract 2190 from 2220, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 13:
The number 438 fits into 300 0 times, leaving a remainder of 300.
Put 0 as the next digit of the answer. 
Result so far: 18955.49315
If we take 0 away from 300, we end up with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Let's proceed to step 14:
The number 438 fits into 3000 6 times, leaving a remainder of 372.
The number 6 becomes the next digit in our result. 
Result so far: 18955.4931506
Deduct 2628 from 3000 and we're left with 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Going ahead to step 15:
3720 divided by 438 is 8 with a remainder of 216.
The number 8 becomes the next digit in our result. 
Result so far: 18955.49315068
If we take 3504 away from 3720, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Our division results in 18955.49315068 with a remaining 2.16e-07.