We look at the division of 21438326 by 575 
The aim is to understand the frequency of 575 in 21438326.

On to step 1:
575 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 575

Step 2:
575 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (4) from the dividend to 21 and continue with: 214 / 575

Step 3:
214 divided by 575 is 0 with a remainder of 214.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 214 and we're left with 214.
Fetch the next digit (3) from the dividend, attach it to 214 and continue: 2143 / 575

Going ahead to step 4:
575 goes into 2143 3 times with a remainder of 418.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 418 after subtracting 1725 from 2143.
Append the next digit (8) from the dividend to 418 and continue with: 4188 / 575

Advancing to step 5:
575 can be fit into 4188 7 times, resulting in a remainder of 163.
Put 7 as the next digit of the answer. 
Result so far: 37.0
Subtracting 4025 from 4188 leaves us with 163.
Include the next digit (3) from the dividend after 163, then repeat: 1633 / 575

On to step 6:
575 goes into 1633 2 times with a remainder of 483.
Use 2 as the next digit of our solution. 
Result so far: 372.0
The remainder is 483 after subtracting 1150 from 1633.
Append the next digit (2) from the dividend to 483 and continue with: 4832 / 575

Let's proceed to step 7:
When dividing 4832 by 575, we get 8 with a remainder of 232.
The next digit of our result is 8. 
Result so far: 3728.0
If we subtract 4600 from 4832, we get 232.
Take the next digit (6) from the dividend and append it to 232, then repeat: 2326 / 575

Going ahead to step 8:
The number 575 fits into 2326 4 times, leaving a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 37284.0
If we take 2300 away from 2326, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 9:
575 goes into 260 0 times with a remainder of 260.
Record the quotient 0 as the next digit in the result. 
Result so far: 37284.0
Deduct 0 from 260 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Moving on to step 10:
If we divide 2600 by 575, we get 4 and a remainder of 300.
Put 4 as the next digit of the answer. 
Result so far: 37284.04
If we subtract 2300 from 2600, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 11:
3000 divided by 575 is 5 with a remainder of 125.
Write down 5 as next digit of the result. 
Result so far: 37284.045
The remainder is 125 after subtracting 2875 from 3000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Going ahead to step 12:
1250 divided by 575 is 2 with a remainder of 100.
The number 2 becomes the next digit in our result. 
Result so far: 37284.0452
Subtract 1150 from 1250 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 13:
The number 575 fits into 1000 1 times, leaving a remainder of 425.
The next digit of our result is 1. 
Result so far: 37284.04521
Deduct 575 from 1000 and we're left with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

On to step 14:
575 goes into 4250 7 times with a remainder of 225.
The next digit of our result is 7. 
Result so far: 37284.045217
Subtracting 4025 from 4250 leaves us with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Let's proceed to step 15:
The number 575 fits into 2250 3 times, leaving a remainder of 525.
Put 3 as the next digit of the answer. 
Result so far: 37284.0452173
The remainder is 525 after subtracting 1725 from 2250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Let's proceed to step 16:
575 can be fit into 5250 9 times, resulting in a remainder of 75.
Use 9 as the next digit of our solution. 
Result so far: 37284.04521739
Subtract 5175 from 5250 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

In conclusion, the division gives 37284.04521739 with a balance of 7.5e-08.