We look at the division of 21358479 by 544 
The aim is to understand the frequency of 544 in 21358479.

Moving on to step 1:
544 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 544

Let's proceed to step 2:
544 goes into 21 0 times with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 544

On to step 3:
The number 544 fits into 213 0 times, leaving a remainder of 213.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 213 after subtracting 0 from 213.
Append the next digit (5) from the dividend to 213 and continue with: 2135 / 544

Going ahead to step 4:
When dividing 2135 by 544, we get 3 with a remainder of 503.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 1632 from 2135 and we're left with 503.
Take the next digit (8) from the dividend and append it to 503, then repeat: 5038 / 544

Moving on to step 5:
544 can be fit into 5038 9 times, resulting in a remainder of 142.
The next digit of our result is 9. 
Result so far: 39.0
Subtract 4896 from 5038 to get 142.
Bring next digit (4) of the dividend behind the 142 and repeat the process: 1424 / 544

On to step 6:
If we divide 1424 by 544, we get 2 and a remainder of 336.
The number 2 becomes the next digit in our result. 
Result so far: 392.0
If we subtract 1088 from 1424, we get 336.
Fetch the next digit (7) from the dividend, attach it to 336 and continue: 3367 / 544

Going ahead to step 7:
544 goes into 3367 6 times with a remainder of 103.
Write down 6 as next digit of the result. 
Result so far: 3926.0
If we take 3264 away from 3367, we end up with 103.
Include the next digit (9) from the dividend after 103, then repeat: 1039 / 544

On to step 8:
544 goes into 1039 1 times with a remainder of 495.
Record the quotient 1 as the next digit in the result. 
Result so far: 39261.0
Deduct 544 from 1039 and we're left with 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

On to step 9:
If we divide 4950 by 544, we get 9 and a remainder of 54.
Put 9 as the next digit of the answer. 
Result so far: 39261.9
Subtract 4896 from 4950 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 10:
When dividing 540 by 544, we get 0 with a remainder of 540.
Write down 0 as next digit of the result. 
Result so far: 39261.9
Subtracting 0 from 540 leaves us with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Moving on to step 11:
544 goes into 5400 9 times with a remainder of 504.
The next digit of our result is 9. 
Result so far: 39261.909
If we subtract 4896 from 5400, we get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Step 12:
544 can be fit into 5040 9 times, resulting in a remainder of 144.
Record the quotient 9 as the next digit in the result. 
Result so far: 39261.9099
Deduct 4896 from 5040 and we're left with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

After the division, we end up with 39261.9099 and a remainder of 0.00144.